ok guys i got a couple questions here. i got a 91 hatch. its got a d15b2. im going to put a z6 head on it. how much of a power gain should i expect. i also want to make it mpfi. how would i do that, im also thinking about itb's bc my friend has a shop and is selling me them for really cheap. if i put itb's on it could i still convert it to mpfi. one last question how much whp and torque do you think it will have if i do all of this. thanks