Quote:
Originally Posted by transam1972
perhaps someone knows the important differences between the years...aren't the heads slightly different?....I believe 71 has a 800cfm carb. and 72 is 750cfm...any slight intake changes?....seems to me 71 had extra black hose plumbing...I do not know what that is,just emissions?
|
there were a few changes, but more technecal then i am good at.
the 71 head has a better high lift flow potenial because of some small changes in the port shape. i have had it explained to me, just can't explain it myself.
1972 had a small change to the intake floor that has been documented to decrease flow slightly, all FACTORY over the counter replacements have this change if produced after 1971, no matter what part number.