correct me if I'm wrong
 

from what I've been reading in regards to a B20 swap in a 1991 Integra
is that you just have to install the stock B18's distributor,
intake manifold and injectors on any OBD B20 motor ex. B20Z
and it'll work fine as long as theres
a FPR and a slight increase in fuel pressure?

I see some people saying, use prelude injectors as well
others saying, no need
Are bigger injectors neccessary?

Most of the guys saying no need arnt even tuned...

Alot of guys uses 310's on those b20vtecs.

it's a straight swap for dizzy and IM. i don't see a need for the larger injectors. use the ones from your LS cuz i believe the ones from the b20 are high resistance and obd-0 LS is low resistance and that's what you need to plug into your car.

so high resistance OBD-0 injectors. 240 cc???