Info is off the compressor maps Brian,though I can personally vouch for the 64 going past 80lbs a minute and on a buick v6.motor had more than 8.7.1 compression.
I'd like to see the details of going past 80lbs/min. Like what was the exhaust to intake manifold pressure and was it all in. The ones I have logged wouldn't make it to 80lbs/min unless the air was really good. Like -1000 or better and would have required a proper wastegate strategy to get the most out of them. One of them had a Precision front mount and Based in what I've captured lately that Intercooler isn't causing any pressure drop issues. As a comparison I had a Precision 64 up to 82-83lbs/min in ok air on one engine. A little under 700whp with a T4 tang and 8.7:1 CR. Cam had a little more overlap than optimal for that engine with the turbo all in. The car trapped 110mph in the eighth at 3700lbs at LVD shortly after. The same engine I put on an MFS 6766 with a larger compressor cover and picked up huge. Peak went to 750whp and was up over 90whp at 6000rpm over the 64 with the small cover. Same style 66 exducer turbine
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