The flywheel and clutch assembly along with the starter and bellhousing are all the same on the 250 and the small and big block V8, right down to the bolts. Flywheel diameters and clutch plate sizes changed depending on year and application and that makes for two different size bellhousings and 2 different starter noses to match the flywheel being used. So if you have a V8 in the truck and want to replace it with a 250 just reuse everything off the back of the 8 including the starter. Mounts need to be correct for the 6 and you might need to move the radiator forward for the added length. All this is no hassle as the 64 pick up came with a 230 base engine so used or NOS or aftermarket repro mounts exist.
The 292 will require drilling out the flywheel bolt holes to 1/2 inch and then all parts fit as on the 250. The 292 also has the right side motor mount about 3 inches further forward and again, the correct mounts should be easy to locate.
Some of the engine wiring may need extending if there is not enough slack to reach along the inline engine for temp sensor, ignition wiring, and alternator wiring. Wiring that goes to the starter solenoid will be long enough as is.
Carb linkage will need to be located or you can use a universal aftermarket cable kit with a little fabrication of mounting brackets.
If you can locate an unmolested donor truck in a salvage yard or some farmers back field you can score all the needed mounts and linkages.
Mike
