I have a 90 sentra that I am looking to beef up. original motor i blew and I want to swap motors GA16 or SR20de or det. Current set up is a GA16i with 5 spd tranny. would like to keep 5 spd tranny option. Any suggestions? or what do i need to do, Have a couple of options lined up on ebay.

I'd go for the DE. I hope you have some money or know your way around an engine bay, cause it's not gonna be easy.

Maybe a JDM front clip for the conversion. Hopefully that will be easier