I've searched and need info PLEASE

Im putting my ducks in a row here on making changes to my truck. EFI, exhaust, EGR block, PCP, ect. One thing for sure is Im going to build my tranny before I do this (when I do this). The shop that I have spoke with about doing all this work told me that if I do a transgo jr and a torque converter that I would be pretty well covered in the tranny area. Ive seen threw some of the post to just go a head and do a complete rebuild, the clutches are gonna slip depending on what kinda of power you put to them so on and so on.. SO

Im not building a 500hp truck (if I get one ) Im looking to have a hot tune but nothing like 500hp. More of a daily drive with a little more power and a whole lot better MPGs

That being said would a jr and a torque converter do the job for me? Or do yall suggest doing something different?

Thanks for the info. :drink