What adapters are necesssary to use the R151f with duals behind a 22re? I think they bolt to the motor but require adaptors or something to use gear driven cases right?

Nope. It'll bolt right up between a 22R/RE and regular MC-07 / MC-07 R-10. It's the best of a V6 (technically) tranny and a gear-driven case with a 23 spline input. That's what I've got goin' in my ride. I just tore down the turbo case this last weekend for the crawler adapter, and now goes in my 23-splined 4.7 top shift rear case.

The r-150 (V6 tranny found behind 3.slows and 3.4s <--- not sure about 3.4s ) needs and adapter after the tranny output to mate gear driven cases. That might be what you're thinkin' about.