Quote:
Originally Posted by mtwilly
Thanks, Bill. I checked out the NHRA blueprint guide and it tells which chamber head to use for each motor. Do these parts have to be dated 1976 or just meet the specs? Thanks again for the help
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Nope, the correct casting number is all that's necessary .
I'd run the 400. J, K, or L (K is the best bet, index-wise)
Let me know if you need any more help.