alright guys here goes all the info,i have an 88 crx si with 88 ecu and tranny.Ijust bought a 91 d16a6 block with a z6 head on it.the 91 intake manifold is a little different than my 88 ,the 91 seems to have less vacuum lines and also has an extra plug on the back of the manifold.Can i use the 91 manifold or will i have to swap in the 88 manifold?is either one better than the other?and also what would be the best way to wire up the vtec?get a z6 ecu?rpm activated switch and fpr?thanks for all the help guys

 

i didnt know the 88 and 91 manifolds were different..

but the most ideal way to wire up is to convert to OBD I so you could run the proper ecu, and have the proper vtec fuel maps, but you can use a rpm switch if you want (this way you wont have to convert anything)