i have a 2000 lexus gs300 and i live in canada, i have the 2jz-ge usdm which has different water pump, feul injectors, and the usdm 2jz works on a maf sensor where as the jdm 2jz has a map sensor. my question is can i still build what i have to like 600-700 hp or i gotta swap it with a jdm 2jz-gte?

 

Don't take this the wrong way, but there's over two decades of material on this topic. I would recommend spending some time with the search function and reading peoples' build threads because there is a lot to go through.

 

I keep searching difference between usdm ge and jdm gte and nothing pops up it’s all about 2jz-gte jdm nothing useful comes up.

 

Add "NA-T" to the terms you search for. That is what people call 2JZ-GEs with a turbo added (to differentiate from the 2JZ-GTE).
Lots and lots and lots of people have done this, in GS, IS, Supra...