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 1959-1979 Big Pontiac Tech
 455 power
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Mac6539
Tribal Scout

USA
1 Posts

Posted - 29 Nov 2018 :  10:15:57 PM  Show Profile  Reply with Quote
I have a 74 455 pony. All stock lower end. Has 46 6h heads,roller rockers, xe 268 cam,edelbrock perfermer intake and edelbrock 750 carb wth th400 and 3.73 posi gears.
1 any guess on compression ratio
2 its got some get up but was thinkin it should be more.
Any suggestions ?

tjs44
Crazy Horse

USA
545 Posts

Posted - 30 Nov 2018 :  11:10:32 AM  Show Profile  Reply with Quote
Not a great source of carb.A good properly setup pontiac QJ would be a better choice.Also with your 455 you really dont need a 3.73,a 3.55 or 3.42 would be more my choice.Tom
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