Re: the '416' head thread
stock 416s, right off the motor, untouched. tested at 28" on superflow SF600 bench, 4.06 bore. clay radius @ intake port, no pipe on exhaust.
Obviously, if you have a good used set of vortecs, use them, as they flow approx 220/135 in stock form, and 225/170 with a quick fluff n buff.
However, before spending 550-600 a pair for new vortecs, you might be better off getting a set of reworked 416s....im feeling confident that these babys will match the vortecs easily with a 1.94 valve and some bowl and chamber work!!!!
"You boys better hold on 'cuz I'm gonna hafta stand on it." - old man, Stroker Ace
Big Orange 66 cutlass
A-body Olds, chevelle drivetrain.
pump gas SFT 496,
RHS 360s, 830 carb
TH400, 3800, 3.73
all motor, no cage, brake, box, spool or trailer.