I had the .86 and full boost was at about 4700 @ 19psi. I made 387rwhp on pump gas. I had tubular manny, greddy intake manny, 264 cams, FMIC, full exhaust and 740cc injectors.
The smaller housing is maybe 5-700 rpms less laggy. Still not nearly as responsive as the t25. 387rwhp and my et was 12.5@ 117 on street tires so dont think 350 will get you 11's unless your a) using slicks, b) an accomplished drag racer, and c) in a very light chassis.