Cutting A833 Input Shaft Question

Daves69 said

FWIW, I'm thinking the majority of factory cranks only had a center drilled for machining. Others had various rough dimensions drilled. Then there are the application specific for the manual trans. Those LA & B-RB cranks that are not drilled can house the newer converter snout bearing for a shortened input shaft. It tends to be easier to install a bearing and cut an input rather than drilling a crank to size, pressing, then sizing the bushing, especially with the crank in the engine and the engine in the car.

BTW, it's advisable to indicate a new bell housing to the cranks center line per the FSM.......

[URL]https://mymopar.com/service-manuals/[/URL]

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the crank centre makes sense, i thought they were all drilled to take a pilot bush for a longer input shaft but I guess not
makes sense for this one to perhaps be a shortened "long" input shaft, and perhaps was suited to be put behind a non-drilled crank.

at the time the owner perhaps thought Ill die with this car but the engine probably blew up and the trans was on sold and the shortening of the shaft was forgotten through the hands of trade

yep, i agree trying to drill a crank in situ would be impossible to do it accurately

I've seen a few setups with a dial gauge and a centre made for the bearing retainer bearing, is that what you mean by
"BTW, it's advisable to indicate a new bell housing to the cranks centre line per the FSM....... "

what is an FSM?