I have a C6 with 351m/400 bell out of a 78/79 bronco with np205 adapter that I plan to use for my 425 hp 460 build, in a 72 F250.
My trans guy has disassembled and verified that it has what he calls 'small drums', and says I should use 'big drums' for my 460 application.
I have a FE/390 C6 in the truck now I would rather sell in functional condition with the 390 as a package. He thinks the FE C6 would have the large drums and could be used in the 351m/400 case I have.
Looking at diagrams I see there is a 'forward drum' and an 'direct drum' each with there own clutch packs. It appears that the 'direct drum' that can hold 5 clutches is available from a few places for about $80. Wondering if this is an option, or do I still need the larger forward drum as well...
He said the difference is in the location of the retainer clip that allow more or thicker clutches.
Builder also states that the 351m/400 case has a smaller reverse clutch that can cause chatter in reverse when running big tires (40"). I'm avoiding trying to find a real '460 c6' to address this. Anyone have an experience to share?
Trying to educated myself so I can make the right decisions, thanks.
14 F250 6.7, CCLB, 37s
04 Mustang Cobra, 14psi + N20
Last edited by rattle_snake; 06-17-2019 at 04:56 PM.