i have a 90 acura integra ls and it has a bad b18a1 in it. i was wanting to put a b20 in it, but i don't know if the b20 will bolt to my factory b18 tranny. do i need to change the tranny,ecu, or wiring harness. if this motor will bolt to my original stuff what b20 would be best. i am looking to frankinstien the b20 to other parts to make my integra perform like the sports car i believe it can be.