I used a 360 with Holley Strip Dominator, unported LAX heads, around 255*@.050 flat tappet cam in a 3,540+ lb car. BUT.....it had 4.86 gears, 30x9" tires and a converter that actually flashed to 4900-5400 rpm, depending on the weather. Footbraked from 3-3500 rpm, stayed well above flash thru the...