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#21
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Quote:
I know GM replaced 12's with 13's under warranty, They are so close in specs. The 13's were in good supply. A friend ordered a pair of #12'S in 75, and got 13's The reason they are often called RA heads is because they are, for the most part, identical to the #12 head. I have only seen 13 heads on 4 BBL engines my 2 cents
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"The Future Belongs to those who are STILL Willing to get their Hands Dirty" .. my Grandfather |
#22
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One of my cars is ram air III, auto, non A/C -- built with 12s
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