I've never wired a megasquirt no but I've done more then enough research to know what I'm talking about. Depending on where the OP lives it's not as simple as taking it to a tuner to get tuned. I know where I live there is nobody to help you tune a megasquirt. I have several Hemi engine harness' I purchased for 20 bucks from salvage yards that could easily be used with a reflashed pcm. I can buy a pcm for 200 bucks from the local salvage and send it out and get it flashed for 100 bucks. Done and done. People overreact when it comes to this stuff and end up finding the hardest route in an effort to "save money" I myself have 3 car pcm's and 5 truck pcm's. they are very easy to come by and cheap if you have the contacts.