ramrod heads
#1
ramrod heads
whats the diff between 68 #5 heads and #5w31 heads is it just bigger valves and springs or was there port work whats the specs? also is a1970 4 bbl manifold(CAST IRON) and a w31 intake manifold the same design just the one is aluminum?
#2
The W-31 (and W-30) aluminum intakes were the same design as the cast iron. The only difference is the material.
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