Quote:

"....With the crankshaft being longer on the early BB wouldn't a simple spacer equal to the difference of the later crank fill the void? This would put the flexplate in it's original (in this case 361) position....."

Just the opposite as wants to use a later Big Block.....the newer motor will have a shorter crank flange and would pull the convertor too far out of the pump.





You need to re-visualize this.

early BB has a longer crank than a later one.

A spacer for the later crank would fix that.

Nothing special about it, though I dunno if anyone makes them, but building one should be easy for a machine shop or someone with the machine tools. Not sure if the early cranks use nuts and bolts to attach the flexplate or the crank is threaded.


They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.