k frames
62-66 --will not interchange with later years
67-- 1st year new design
68-72 pretty much all the same-- (biscuit mounts)
73-76 pretty much all the same-- (spool mounts)
67-76 will all fit the cars--- but swapping in has unique parts .
If you want to swap to a v-8 by switch "K" frames-- do some searching on installing the motor attached to "K" frame--- might be worth a look.
Lawrence
