Re: 38r questions
38r is your only drop in option. You'd be suprised how much abuse a 38r can take. If you want more fuel only HP capablility you should start looking for a modded H2e or gt42 but those require different mounting kits. You also start losing streetability and towing capability if you start getting really big.
Best towing turbo I have run thus far is a modded H2e...
[CENTER]01 F-250 SC PSD,430k,16 Isspro Gauges, AFE-2,CCV Mod,IAH delete,map reg,Modded H2e, 6.0 IC, 230/100, Studs, 910 springs, Forged rods, Hydra chip, Swamps HVHF IDM, MBRP 4" dual's, Aero, 6" tip's, 4" Revtek lift, 37/12.5/16.5 MT's