Do u think boost reference the power valve help the 390.trying to smooth the bottom end out a tad.trying to avoid a new carb but might have to bite the bullet and do it...just use a 4bbl holly to a 2bbl holly adapter I'm guessing...hopefully hole in tank lines up when done! Thank u
Has anyone drilled 4 small holes (1 in each carb butterfly)on a holly 390cfm 4bbl to smooth out the idle on a magnacharger setup? If so what size holes? Thank u.
I'm not sure how to pm...new to this forum thing..can I just give u my phone number or email and go from there? Sorry I'm technology challenged sometimes