Input shaft - auto or standard crank

Just in a dilemma - the first 4 speed I ever bought and still have had the input shaft cut off to use I guess in a automatic crank. I'm now in the possession20210107_174842 (1).jpg 20210107_175124.jpg 20210107_175131.jpg 20210107_175203.jpg 20210107_175258.jpg 20210107_174312.jpg 20210107_174344.jpg of two nice 360 engines that both had automatics behind them. I know I will need a 360 standard flywheel which I have.

I have a little 273 factory 4 speed crank I'm using for reference with a factory input shaft. As you can see it goes way far in there.

On the 360's - one I put a flywheel one and the other has the auto flexplate on - the input doesn't look like it goes all the way like the 273 does.

If you look at the 273 flange - you can see it's about 1/4 shorter than the 360's.

The 273 crank has the blue tape over the throws.....wish I had the photos in order !

I think I'll be okay but thought I would get youse guys to weigh in..

Thanks in advance.....