questions on ls/vtech conversion

i have a 1991 LS (b18a) integra. Just some questions

which head would be the better (better performance and easier to convert) to put on my b18a bottom end, the b16a or the b18c?

and also how much horse power increase has someone who did this actual conversion get?

do i have to change my ECU and wire loom?

what other parts do i need to get different from the head?

one word: SEARCH!!! this topic has been done to death. I personally have answered questions about the basics, MANY times, and so have many other members. So, please, delete this thread, and do a search here on g2ic. do a search on the net as well. gather as much info as possible. then come back and ask specific questions.

oh, and its “VTEC”, “VTECH” is a type of phone!