It sounds like everything you have in mind is most of the upgrades to get the most out of the stock motor. You are correct on the electronic ignition being out of a newer truck (Isuzu P'up) and I have also read here of people using a Petronix ignition, but I don't know much about it. As for the intakes, I haven't got any dual plane before this order and have not had my single plane installed yet to be able to compare the both of them, but you are right on the intakes. The dual plane (6203-DPW) would cover the whole spectrum where the single plane (6204-CW) would cover the upper 2/3 of the spectrum. It seems most people want the 6204 and mostly 4x4 owners want the dual plane, but both will work on the '76 - '80 trucks with the stock motors and both of these will work with the Weber carbs. If you do end up wanting an intake just send me a PM and I will let you know more details. You have plenty of time to think about it though since I am still waiting on the order to get to Offy from the foundry and then after machining on to me. I am hoping about a month or so, but we will see. Maybe someone else who knows more about the performance difference between the intakes will chime in? About page 8 or 9 of the Offy thread there is some scans from the Offy catalogs on the intakes, maybe you have already seen them, but if not they may give you more of the info you are looking for.
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