EFI on early 318

I was wondering if any here had hooked up a magnum EFI to an early small block? I have my 318 in the machine shop and am looking for a set of Magnum heads. I was just thinking of taking the whole top end and put on my 318. I have heard of people hooking aftermarket EFI's to early blocks but what about the stock ones? Anyone here use a MegaSquirt setup? Anyone know how well these are? How difficult is it to set an EFI system? Would it be even worth setting one up?


http://www.megasquirt.info/