I have a slightly different issue

I have a 91 integra with a B20B i'm using the ls intake manifold,sensors fuel rail, distributor, etc....it's really sluggish, takes a lot of pedal to get it to normal speed. I read on another website that the B20 runs lean on an LS ecu. Do you have any suggestions or advice on this problem???

does it still have power just needs alot of pedal or just sluggish in genral?

It might be a simple loose T cable b20 runs little lean but should still be fine with LS ECUs i've seen a few cars run that with no issues.

Never hurts up upgrade your ECU with chipping or tuning.