6 lug to 8 lug swap

[Twisted71]

Hola, I have a 71 chevy c10 4x4. Everyone says the 12 bolts a POS so I've gone nad purchased a 14bolt ff. Im still looking for a d60 front which seems to be a pain in the buttox. How hard is it going to be to swap the axles. I know the spring perches need to be moved cause 14 bolt is 42 inches I believe while 12 bolt is 40 or some wierdness like that.

I plan on running 33's with a 4 inch lift. I think im going to go 454 with a th400 with a np205. I plan to gear for 3.73 so the gas milage isnt terrible.

Any ideas would be great thanks

T71