That sounds like an idea i would have come up with a few years back. wouldnt it be great to make your own efi computer. the reality is u can save yourself a heap of trouble by buying a ready made computer. im not talking about a $1000 or so wolf 3D as i am assuming u want this done on the cheap. what u can do is use a delco computer from a camira/88model pulsar Q/commodore. they use a memcal reprogrammable ecu which can be easily removed and reprogrammed. off the top of my head i cant remember how much this is worth, but it should be about $200-400 or there about, which is very inexpensive when talking in terms of cheap EFI setups. Myself and two friends did such a setup on an '87 twin cam corolla. the advantage being that the ecu was so easily modifiable. this was made easier by a close friend who actually worked at Fueltronics here in adelaide, otherwise we would have been lost for sure. if u really are keen, give Fueltronics in Adelaide a call.