Megasquirt 2 is a better board for sure, gives you finer control and still has ongoing development, but the older one will do everything you need.
Buy a solder iron and build this:
http://www.diyautotune.com/catalog/d...kit-p-385.html
Lots of people with less ambition and skills that you have done it, I know you'd have no problem.
Ms3 is the newest and isn't needed for older motors.