I did a 383 many moons ago that used untouched 180 cc Pro Topline heads at 10.0:1, Performer RPM Q-Jet intake with a Q-Jet from The Carb Shop, Comp XE, hyd/flat 270, 227* at .050 on a 107 with 1.6 rockers and long-tube headers and it was good for 455 ft/lbs at, if memory serves, just shy of 4,000 rpm. I think it peaked hp at 405 somewhere around 5,500 rpm; under that, if anything.gnicholson wrote: ↑Mon Apr 16, 2018 1:07 pm If you want low rpm torque you need to think small cam on a tight lsa .108 at most and 270 adv duration. If i were towing i would go 106 and 262 to maximize torque at 2500 rpm
Edit: That was a no-frills build by the way. No windage control, no intake heat management, fat rings, etc. Just a clean engine build.