Will a c-6 ford transmission off 460 motor fit on 390 motor?
Yes, a C6 transmission from a 460 Ford engine will generally fit a 390 Ford engine. Both engines use the same bellhousing bolt pattern. However, you might need to use the correct flexplate or flywheel for the 390. The 460's flexplate/flywheel won't work directly. Using the incorrect one can lead to serious engine damage. Also, make sure the transmission's output shaft is compatible with your intended differential.