Sorry to hear about your vibration problem, I just had my tranny rebuilt with new WR M22 gears and before I install it with a new clutch, p.p. and t.o. bearing, I am going to check the bellhousing alignment.
I've just ordered the Browell tool and not sure which dowels to go with if I find the bellhousing alignment is out of tolerance. I was reading the Moroso and Lakewood websites and, contrary to what Jerry wrote in the CRG report about "Once you have correct alignment, apply either red or green Loctite to the dowel pins...",
Moroso doesn't mention using loctite but rather says to drill the block for set screws:
Lakewood's instructions don't mention Loctite either when using the EZ Adjustable dowel pins and say to "turn setscrew to tighten (which runs down the center of the pin) and positively locks the dowel in position".:
With the engine in the car, seems the Lakewood EZ Adjustables are the simpler install and probably prudent to use Loctite.