Hey all!

I have a 350 that I swapped into my 1958 Viking 60.
I obtained a GM 505 bellhousing so I could retain the bellhousing motor mounts.
I'm using a Novak ring to firmly mate the SM420 to the larger opening in the 505.

The starter I'm using is a NAPA unit that is supposed to fit a 1970 Chevy truck (the bellhousing was supposedly used on 68-72 trucks)
I'm using the 3 bellhousing mount points for the starter instead of a block mount variety.

Here is the flywheel being used, a 168tooth variety.

The starter does its job without strain but it has difficulty disengaging. Enough to where it feels like I'm causing damage.
Most of the 'pain' I feel is on disengagement rather than engaging or during cranking.

Is there any possibility of shimming on these 3-hole-bellhousing-mount starters?
I'm not really sure how shimming would help, it'd just prevent the gears from meshing as deeply?
Shimming wouldn't pull the gear towards/away from the outside of the flywheel like it would on a block-mount.

Does anyone have any suggestions? I don't think I have a mismatch of components but it's hard to know with so many things changed at one time.
I'll try and take a video to capture the symptom later today and post back.


1958 Chevrolet Viking 60
Assortment of photos