whiteboy_77_77

Hey i put a 1991 injected 460 in my 91 bronco and i want to put a 4 speed behind it but i can only get a 5 speed clutch for the injected flywheel , my question is does anyone know if the balance and blot pattern is the same off say a 87 flywheel????? witch i can get a 4 speed clutch for. thanks for any help

Paul Kane

Both the 1987 and the 1991 engines use the same 3Y crankshaft, and both engines are externally balanced. Therefore, you can bolt the '87 flywheel to the '91 crankshaft. However, here's something that you need to investigate: The 1991 engine accepted a ZF 5-speed while the 1987 engine accepted a T-18 or T-19 4-speed, and I don't know whether those two different brand transmissions used the same pilot bushing or not. I advise you to inspect the ends of both crankshafts to see if they both use the same ID bushing, etc. If possible, inspect the pilot end of both transmission input shafts. I'll bet that the changeover is possible, but check first if possible.

Paul

__________________