Originally Posted by Dbyers2

I've got a 5.3 with a TR220 with some valve train work done, currently I have a mid mount turbo system with a MP70 running on 9 lbs with an alky control meth kit 60lb bosch injectors
Ran a 14.0 at 101mph

Now I'm going front mount and need some expert advice on turbo selection my goal is to get my truck in the low - mid 12s would this be possible on 10 lbs of boost with a 76mm class turbo I was looking at the BW475 the only hold back is the T6 housing with 1.3 a/r is the exhaust side going to be to big for my system
And what are the advantages/disadvantages of going to a 78 or 80mm