Cratos
Well-Known Member
my 383 sixpack has an annoying back fire issue only under load I get single back fire??? I have played with the timing and changed to lower power valve.
running about 12:1 on the AFR
sixpack spec cam,and springs, roades lifters and new sixpack set-up 355 rear and 727
running about 12:1 on the AFR
sixpack spec cam,and springs, roades lifters and new sixpack set-up 355 rear and 727