integra engine swap

I have a 94 LS with 190k and a blown head gasket. Im lookin to swap out the engine and the car is an automatic. Im wondering if I get a b18c1 from a newer gsr, are there any automatic trannys that will fit? If not Im stuck with the b18b1, which is cheaper, so how can I make a little extra power with that?

the b18b1 is a remove and replace. the gsr will require a few more modifications and will be 3 times the amount it will cost to simply just swap out the longblock on the ls chassis.

swapping out the headgasket is the easiest route.