Re: latest turbo
we sell a cnc machined adaptor to allow for any T3/T4 turbo with 5 bolt turbine housing and wastegate to bolt up to the stock downpipe. From there it mostly depends on your budget and torque converter stall. Better heads with aftermarket springs, cam, etc can benefit from larger turbos and higher boost. If you are running pump gas you need something more efficient in the lower boost range. With meth or race gas you can run something efficient in the 20+psi range.. so there are alot of variables.
However i really like the 60-1 or GT61 turbo for stock motor daily driven trucks. Works extremely well from 15-25psi.