if u know how to solder and assemble boards, u can make a megasquirt for around $175, i have a guy that makes them and comes with a CNCed box for about $248 shipped. Like that its a full fuel controller, to add ignition control all you have to do is buy the 8 cyl EDIS parts, coil packs, VR sensor, trigger wheel, EDIS module, which u can get a cophers u pull it for about $70 (thats if you dont pocket anything ) and then you can have a full standalone for under $350. The megsquirt II will be out within the month, which will be the same price (im pretty sure, are like $10) more which comes with a faster processor and a 12x12 vs the normal 8x8 VE tables. So basically you just upgraded to the best ignition system possible and got a full standalone so you can sell your MSD shit bc the EDIS will out perform it. The only down side (like any full standalone) u have to build a harness, if u need help with that, ive done a few now.

plug in a laptop, download the shareware tuning software, and tune on the fly.