Whats the differance in the JDM Engine and the USDMmotors

And Whats the differance in the high port and the low port engines and witch is better and what years did these come on?

What year JDM Engine should I o for?

i think the jdm engines are rated at 150 hp
some are 9.5 :1 some are 10: 1

the high port engines give a more direct path for the air to flow in the head

im not sure if theyll let you specify what year engine youll get, but i know i told them to make sure it was a high port.

do some more searching and youll find all you need to know

What year JDM Engine should I o for?

Just make sure it is a high port. Intake runners curl above the throttle body. and like Adam said do a search on JDM's lots of threads on them.