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 Bought A 455
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RayK
Cochise

USA
925 Posts

Posted - 03 Oct 2012 :  06:02:06 AM  Show Profile  Reply with Quote
I was going to build a 400 for my 73 GP, but then a chance to buy a 455 came up so I bought it. It's a 71 block with 72 heads. The casting #'s begin with a 7 but then someone has ground off the rest of the casting letters/numbers. The center exhaust ports look funny though. The exits are "open" without having the separator in between. Pressed in studs.
Whomever had it before hit something and it smashed the oil pan, and in return it hit the crankshaft and put a few knicks in it on the #2 main throw. But I bought it and I'm going to use it I just have a few things I need to check out.

1969 Firebird 461, #62 iron heads, Comp roller, Performer RPM, Q-Jet Turbo 400 w/ Continental converter. GM 8.5" 10 bolt with 3:73 gears.11.50's@ 119+ MPH

Chicagogoat
Cochise

USA
823 Posts

Posted - 03 Oct 2012 :  09:57:41 AM  Show Profile  Visit Chicagogoat's Homepage  Reply with Quote
That nice Ray! Any 455 is a good find, but the grinded of casting #'s and other damaged stuff would make me worry. Those heads are unusual but I remember that Fel-pro makes a header gasket without the divider in the middle ports, I wonder if that's for those special heads or someone modified them. I heard of "knife edging" the intake ports for supercharging but can't say that I've seen heads with exhaust like you're describing.

Pure Pontiac: learn it, live it, love it!
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Blued and Painted
Chief PONTIAC

USA
3409 Posts

Posted - 03 Oct 2012 :  10:25:31 AM  Show Profile  Reply with Quote
On my current project i ended up throwing everything away except the block, intake, t-cover, and bolts.


Bull Nose Formula/ 461/ Q-Jet/
TH400/ 3.08 8.5 / R44TS.

Edited by - Blued and Painted on 03 Oct 2012 10:25:50 AM
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RayK
Cochise

USA
925 Posts

Posted - 04 Oct 2012 :  08:15:00 AM  Show Profile  Reply with Quote
According to the previous owner, once removed, the engine ran fine, it just wasn't a numbers matching engine for his GTO so he sold it. I saw a video of the car supposedly running this engine and it did a very nice burnout, but anybody can do a burnout. I'm going to "wing it" and put it in the car and see what it does, although I am going to change the heads and most likely camshaft as well.

1969 Firebird 461, #62 iron heads, Comp roller, Performer RPM, Q-Jet Turbo 400 w/ Continental converter. GM 8.5" 10 bolt with 3:73 gears.11.50's@ 119+ MPH
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Blued and Painted
Chief PONTIAC

USA
3409 Posts

Posted - 04 Oct 2012 :  10:35:04 AM  Show Profile  Reply with Quote
455, I'm jealous. Good luck with your new project. What cam duration are you thinking about?


Bull Nose Formula/ 461/ Q-Jet/
TH400/ 3.08 8.5 / R44TS.

Edited by - Blued and Painted on 04 Oct 2012 10:37:03 AM
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RayK
Cochise

USA
925 Posts

Posted - 04 Oct 2012 :  12:23:12 PM  Show Profile  Reply with Quote
I'm not sure as yet. I have a few things to decide on as I'd like to change the rear gears and go with 3:73. I will post when I finalize everything.

1969 Firebird 461, #62 iron heads, Comp roller, Performer RPM, Q-Jet Turbo 400 w/ Continental converter. GM 8.5" 10 bolt with 3:73 gears.11.50's@ 119+ MPH
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Phil
The Great White Buffalo

USA
7223 Posts

Posted - 04 Oct 2012 :  3:37:49 PM  Show Profile  Reply with Quote
That should be a 4 bolt block.

Bowties are for Pee-wee Herman. "Chevy": even the name sounds cheap, but not as cheap as your Pontiac will be with an LS transplant.
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cortcomp
Coyote

USA
5339 Posts

Posted - 04 Oct 2012 :  7:14:42 PM  Show Profile  Visit cortcomp's Homepage  Reply with Quote
i think most 455s are drilled and tapped for 4 bolt mains, but lack the caps. of course, with the cost of the caps and line boring/honing, you have to wonder if it's worth it or needed.

My 428 is 4 bolt and has the factory 4 bolt caps, which i was pleasantly surprised to find out.
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Phil
The Great White Buffalo

USA
7223 Posts

Posted - 04 Oct 2012 :  9:56:07 PM  Show Profile  Reply with Quote
Only the first few years. Maybe 72 or so was it except the SD in 73 and 74.

Bowties are for Pee-wee Herman. "Chevy": even the name sounds cheap, but not as cheap as your Pontiac will be with an LS transplant.
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cortcomp
Coyote

USA
5339 Posts

Posted - 04 Oct 2012 :  10:09:06 PM  Show Profile  Visit cortcomp's Homepage  Reply with Quote
my block is a 74 (the 455 of course) it had them drilled and tapped. From the heads on it, i'm guessing it was from a big car? (had 4x medium sized heads, like the 95ishcc ones, not the 114 cc ones) *shrug* didn't care, crank was std/std, so not messing with caps at that point. They're like $350? crazy!
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rad400
War Paint

USA
1251 Posts

Posted - 05 Oct 2012 :  07:42:14 AM  Show Profile  Reply with Quote
Nice score Ray.

Conrad
79 Trans Am 400 auto Crower 60210 Torker II Holley 750 vac sec. #12 heads,3500 stall.
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RayK
Cochise

USA
925 Posts

Posted - 11 Oct 2012 :  12:29:13 PM  Show Profile  Reply with Quote
I decided to change the heads out. I have a set of 6-X 4 heads that I'm going to tear apart tonight and get into the machine shop for cleaning and new valve guides. Then I'm going to gasket match and do some porting myself. I decided to go with a 60919 cam. .231/.240 and .470" lift. 112 LSA. I think this combo should work pretty well with 3:73 gearing.

1969 Firebird 461, #62 iron heads, Comp roller, Performer RPM, Q-Jet Turbo 400 w/ Continental converter. GM 8.5" 10 bolt with 3:73 gears.11.50's@ 119+ MPH
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Blued and Painted
Chief PONTIAC

USA
3409 Posts

Posted - 11 Oct 2012 :  1:04:16 PM  Show Profile  Reply with Quote
I would touch up the bowl's before valve job


Bull Nose Formula/ 461/ Q-Jet/
TH400/ 3.08 8.5 / R44TS.
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RayK
Cochise

USA
925 Posts

Posted - 18 Oct 2012 :  11:24:12 AM  Show Profile  Reply with Quote
Pulled the mains on the 455 and the crank is turned .030 under. I have another crankshaft, but it needs to be cut as well. Since this isn't going to be a race engine, I'm going to leave it for now. The car the engine was in is a 4 speed 70 GTO and the end play on the crank was around .005" - .007".

1969 Firebird 461, #62 iron heads, Comp roller, Performer RPM, Q-Jet Turbo 400 w/ Continental converter. GM 8.5" 10 bolt with 3:73 gears.11.50's@ 119+ MPH
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Lucas
Cochise

USA
428 Posts

Posted - 19 Nov 2012 :  11:28:18 PM  Show Profile  Reply with Quote
Remember Ray, That GP was originally a 455. Definitely not many model J's came with them. That will be cool to have one back in there.

"wildfire"
Real pontiac power
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RayK
Cochise

USA
925 Posts

Posted - 26 Nov 2012 :  1:27:54 PM  Show Profile  Reply with Quote
Lucas, I can't forget that! I should have bought the one you had in the car but i just didn't have the "extra" money at the time. Did you ever do anything with that engine?

1969 Firebird 461, #62 iron heads, Comp roller, Performer RPM, Q-Jet Turbo 400 w/ Continental converter. GM 8.5" 10 bolt with 3:73 gears.11.50's@ 119+ MPH
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Lucas
Cochise

USA
428 Posts

Posted - 16 Dec 2012 :  12:51:09 AM  Show Profile  Reply with Quote
I did. I bought a 63 Bonneville and dropped it in with a turbo 400. Have been slowly hooking things up so I only have to do it once. Interior is pretty ratty on it so it is a major project but want to have it drive able sometime this coming spring. Its kinda nice not having a numbers matching car to have some fun with. Wanting to make it a sleeper with stock hub caps and nice quite exhaust. Should be fun even if I can get in the 15's at the track.

"wildfire"
Real pontiac power
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rad400
War Paint

USA
1251 Posts

Posted - 17 Dec 2012 :  12:29:35 PM  Show Profile  Reply with Quote
Ray that will be a nice running in your car. Lucas good to see you posting.

Conrad
79 Trans Am 400 auto Crower 60210 Torker II Holley 750 vac sec. #12 heads,3500 stall.
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Lucas
Cochise

USA
428 Posts

Posted - 20 Dec 2012 :  11:42:38 PM  Show Profile  Reply with Quote
Yeah its been awhile. It seems like the older the kids get the less time there is for the little things. But they're only kids once so its well worth it. I try to check in as often as I can.

"wildfire"
Real pontiac power
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RayK
Cochise

USA
925 Posts

Posted - 11 Jan 2013 :  09:17:35 AM  Show Profile  Reply with Quote
Lucas, good to hear from you. I've sent you a few emails but not sure if they got through? I have a new personal email as my AOL account was corrupted somehow.

Lonewlf455bird@gmail.com

1969 Firebird 461, #62 iron heads, Comp roller, Performer RPM, Q-Jet Turbo 400 w/ Continental converter. GM 8.5" 10 bolt with 3:73 gears.11.50's@ 119+ MPH
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Lucas
Cochise

USA
428 Posts

Posted - 12 Jan 2013 :  3:20:32 PM  Show Profile  Reply with Quote
Ray, You have had a heck of a time with your email. I had your AOL email address. I update my address book with your new one. Hope you had a great holiday and hope things are good for the new year.

"wildfire"
Real pontiac power
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