I'm in the process of swapping out my dead C6 for an NP435 in my 77.5 F-250 4x4. I plan on buying a 390 flywheel for a 76 F-250 with a 184 tooth count and can't find any info about using a 390 starter on a 460. I'm using a 400 bellhousing with a 3/16" plate in place of the backplate to help clear my 12" clutch. I just wanted to make sure i had a starter that engaged the flywheel completly. Thanks for any help.