you could keep it N/A and run down stock gtp's. just do the mods in my signature.
but dont ask how much money was spent on said mods lol. I dont regret doing it as I did the mods over a 5 year span and bought 90% of the mods used, but damn it costed alot and I still need to bring the car over to a trans shop and figure out what went wrong with the 3.69 gear install lol.
topswap is a much easier route but your engine better be in good shape and your tune better be perfect or watch your engine go

if i wanted to boost id honest just buy a whole l67 and swap the motors. more reliable in my opinion.