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frankie
Buffalo

USA
62 Posts

Posted - 09 Aug 2014 :  12:42:14 PM  Show Profile  Reply with Quote
I am looking at a block that is hard to determine it. It has three freeze plugs per side but can not find the casting # on it.

It is a YC and has 287813 stamped above YC. The date code is weird and not been able to read it yet. It had 142 heads on it and i mic it to be over 4.1 but could it be a 389 bored out or is it a 400?

Thanks for any help
Frank Muscutt

Merrik66
Cochise

USA
372 Posts

Posted - 09 Aug 2014 :  1:19:33 PM  Show Profile  Reply with Quote
Remember, the date code is on the back of the motor. The date code will be located to the left of the distributor (if your standing at the back of the motor) on the flat spot of the blockwithin a few inches. There will be 4 small numbers which are raised castings. Wire brush is sometimes needed to get the gunk of the area to see them properly. Good luck.
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Merrik66
Cochise

USA
372 Posts

Posted - 09 Aug 2014 :  1:24:00 PM  Show Profile  Reply with Quote
Also, in that area will be another set of numbers which will have much bigger size and be maybe 6-7 digits long. This is the actual casting number. It will tell you what the engine is. When you find these numbers go to the wallace engine website and the numbers can be decoded there. There are other places which have the decoding information that's just the one I used recently.hope it helps.
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WDCreech
Sitting Bull

USA
156 Posts

Posted - 09 Aug 2014 :  8:54:46 PM  Show Profile  Reply with Quote
Date code and casting number locations: [URL=http://s299.photobucket.com/user/WDCreech/media/Temp%20pics/P10302157E120w20text.jpg.html][/URL]

Bill
64 tube chassis GTO, 606 cu" IA tall deck, Superchief heads, glide, 2750lbs, 8.2550 @ 164.17, 1.1981-60'
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