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-   -   Chevy Head Casting numbers need help identifying (http://www.hotrodders.com/forum/chevy-head-casting-numbers-need-help-identifying-111439.html)

derbyguy583 03-15-2007 08:59 PM

Chevy Head Casting numbers need help identifying
 
Hey guy's I have a set of heads I want to have redone and put on My Demo derby Motor I need help figuring out if they are a matched set and what size valves they have in them.Any help would be greatly appreciated. The numbers off of them are Left Side 3973487 also C101 & GM27. Right Side 3973487X also A132 & GM27 Once again any help would be appreciated thanks. Jacob

derbyguy583 03-15-2007 09:00 PM

Re head Numbers
 
Hey guy's by the way these are off of a small block Chevy Thanks Jacob

Rogers Performance 03-15-2007 11:24 PM

Most of the 487x heads i seen came off the 71 LT1 corvette 2.02 x 1.600 valve.

NDNslicks4me 03-16-2007 12:07 AM

ya, a kinda rare head, not really for a demo derby car, no sense in cracking them if the rad gets busted


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