I think hank is correct 7-1 will be very lazy when not in boost, 8.5-1 at 10# boost with mild cam is like 12.5-1, but should work with an intercooler or enough fuel.
10# boost is a pressure ratio of 1.68 and about 43 lbs/min. But I don't think a 292 will flow 43 lbs/ min at only 10# boost, more like 37lbs/min which is still about 370 HP.
A GT35 looks a little big ,a GT30 maybe fine or a 60-1 (I like this turbo) , but I would talk to someone at Turbonetics or Innovative turbos first.
Also use the biggest turbine wheel, (not A/R ratio) you can use since you want the boost to come in at a higher RPM for passing or blast down the road, not as a Drag Race type setup. Everyone tries to sell a small turbine so it spools fast at low RPM, this just feels good but
does not always work the best.
Just my thoughts-Harry
