Its not looking good, all cylinders are between 80-50psi with one at 25. For reference using the same test equipment, the old motor was at 140-150 with 2 cylinders sitting at 75 and 100 respectively.

Added a bit of oil to the cylinders which bumped compression up about 25psi.

The intake plenums were not included with the engine, seeing this timing belt dry rot makes me think maybe the engine sat around like that for a while and theres rust on the cylinder walls?

Looks like the turbo project will be much more extensive then originally planned.