So I was able to get my engine mounted to my engine stand yesterday. The bolts in the back of the block are 7/16 - 14. The holes in my engine stand are ~15.5mm. I made some bushings out of some Oil-Filled Slippery UHMW Polyethylene Rod that I had left over from another project. Bushing length is 2.75". OD is 15.5mm. ID is 7/16. They fit like a glove. It took some work to get the arms in a position where all the bolts would thread in because of close the bolt holes are together on the back of the block. All in all about two hours of work between the bushings and getting the motor mounted to the stand.
