12-25-2011, 11:54 PM
Both the B303 and the E303 have a little chop to their idle. It's more pronounced with more compression and a good 10-15* base time. Even with 1.7 rockers most head combos can be cut to raise compression and still maintain safe piston to valve clearance. E7 castings can be modified to make good street heads too, but it is probably still cheaper to go after market.
If your planning on just swapping the cam for the time being, you'd better upgrade the valve springs too.
If your planning on just swapping the cam for the time being, you'd better upgrade the valve springs too.
'72 TBA...