NASCAR heads
#1
NASCAR heads
Back in the day, when real Olds raced in Nascar what heads were used on the engines ? I know they had specific blocks,but heads ? I can't see any factory sbo head flowing enough air for a Nascar mill.I don't think aftermarket heads could be used.
#5
They also used two different HP blocks! One was siamesed the other wasnt. Blocks came with 3.8 inch bores that were finished by race teams for their needed final displacement. Main sizes were 3.0, 2.75 and 2.5 inch. I have a 2.75 inch non siamesed block with 2.75 inch mains from AJ Foyt. From what I've read 2.75inch blocks were superspeedway engines while 2.5s were for higher winding short tracks.
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