The starter is grinding like it needs to be shimmed ? I was wondering about the 1/8 " GM shim used on BB chevy's with the staggered mount, I've not seen one before so maybe that is the problem?
Thanks for your help so far.
I have gone ahead and ordered a shim kit from Summit Racing that has this shim in it and will try that and let you all know what happens.

Thanks, Raysir