This is my setup
Car is stock weight, full interior no weight savings at all. Add about 240lbs. for me. 3.55 gears(have 4.10s in the garage waiting.) I ran 20lbs. in the rears. Lunati hydro cam 231/
[email protected]" .535/.550 lift +1.6 hughes roller rockers. So .570/587 adjusted. Stock converter. 727 trans reverse pattern manual valve body. MSD 6a ignition. Timing is 12*btdc and 37 total. Not tunable billet distributor from 440 source. Stock front torsion bars and shocks. Disconnected sway bar. ss rear springs and stock shocks. You are correct on tires. 275/60/15. No traction issues. No weight transfer either. I know I have a lot of work to do on it. I originally built this completely as a street car and got bored , so went racing. I felt the car was lazy on takeoff but you can really hear it in the video. I would like to be near 11.5 with this car. I don't want to put a cage in it. Eventually would like to build a dedicated track car. So that's the deal. I feel the 4.10s and a torque converter would really wake this up.
Oh yeah, Offenhauser 2x4 intake w/2 500 edelbrocks, 1-3/4" headman headers into 2-1/2" exhaust. Cutouts just ahead of the mufflers, so the exhaust actually runs through the x-pipe before it gets to the cutouts.