My son and I are planning a car with a Powerglide/C5 differential and the C5 suspension. I have read that the dimension of the axle centerline to block mounting surface is 22 3/4 inches with the C5. I would like to know what this dimension is for the standard Crown configuration with the Corvair Saginaw and differential.
I am considering moving the rear wheelwells to compensate for the additional length and maybe also move entire engine, trans, and differential rearward to gain more room for the driver. I am already planning to widen the body at rear to use the standard width of the C5 suspension with my son's wheels of choice.
I don't want to create an awkward appearing car by moving the rear wheels too far back, maybe 3 inches. So I would like to figure out how much longer the Powerglide/C5 combination will be compared to the standard Crown.