I am going to upgrade my combo over the winter. Right now its a 351W trick flow 170's s-trim on e85 12psi. It made 611rwhp this spring. The s-trim is about maxed out. Over the winter I'm going to freshen up short block get some TF 205R heads and swap intake to ifs-r. I would like to make 750+ through my 4r70w. I have just been thinking if the ti would work good or should I just goto the YSI?