Sorry for the length of this but i have alot of questions. Here is my deal, i have a 1991 CRX with an ls in it, it has all of the original wiring still. I am going to put LS VTEC in it. My setup is going to be a b18a1 block with a gsr head off of a 97 integra. Will everything be plug and play? If not what will i need to do to make it work. Second, can i wire up vtec to the ecu that i have now, or what kind of ecu do i need to get. And lastly is there a vtec distributor that would work on a gsr head and plug right in to my crx harness or what can i do? Thanks for reading.