Hi ! Iam new to the forum. My latest project is a 78 coupe. I am looking to run in the 12`s to start. I am using a 351W with a .512 comp cam ported and polished 69 351 heads rpm air gap and 750 cfm carb and speed pro coated skirt pistons. I have a C4 and a 3200 stall convertor. not sure about the gears I have 3.40s and a set of 3.55s. I will probably use the 3.55s and adjust from there. does anyone have recomondations on tire size and wheel size + backspacing for the rear wheels.