Here's the scoop on factory shift linkage. 67 and 68 big block linkage will work on a small block trans but not the other way around.
All linkage is the same in 69.
The factory Hurst big block linkage rods will work on a small block 70 and 71 trans but it's a close shave using the small block linkage on the big block. The small block reverse rod is a tight fit on the big block trans.
Adapter plates will not interchange between big and small block in 70 and 71.
1972 and 73 linkage will work on 70 and 71 small block tranny but not the other way around because of the 3rd 4th shift rod and lever is different in 72 and 73 for clearance purposes.
Aftermarket Hurst linkage is the same from 1964 1/2 thru 1969 except for the reverse rod is longer on the small block and the adapter plate is different.
1970 and 71 after-market big block linkage is the same as 64 1/2 thru 69 small block but the adapter plates are different.
1970 and 71 aftermarket linkage kits are no available from Mr. Gasket which owns Hurst. [email protected]
its kinda scary to actually think someone like Mark is walking around with ALL that knowledge in him!!! By the way Mark, I am getting ready to try out this "rebuilding" thing on my Boss toploader thanks to your encouraging emails....