Sounds like you're more worried about cracking manifold since you're opting for a log style T3 manifold. If thats the case, hit up Codyace and opt for a stock bottom mount manifold and he can extrude hone it to flow like alot better and weld a 44mm vband flange on it. Opt for a run of the mill GT2871R .63 if you want response or .86 if you want more top end/maybe extra 50hp but slightly laggier.
http://zilvia.net/f/forced-induction...your-sr20.html