I had some time today to mock up the compressor on a spare motor.
Alignment looks good, except for the belt sizing for my specific compressor. Rich, what is the belt size that we have here? I am going to need a shorter diameter belt.
The compressor I'm using is a Sanden 7h15 and according to the Sanden catalog for my particular model, it has a 125mm pulley. Once installed and up and running, I have no doubt this belt will stretch. To tighten it up more, the tensioner pulley will eventually hit the vacuum pump.
On another note, check out how small this Sanden 7h15 is compared to this original Harrison R4.
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