I have a plug and play Megasquirt ECU for sale. Its a V3.57 with 2.1.0 firmware. It is an amazing ECU, did everything I ever needed. Here is the link from DIY

MegaSquirt-II V3.57 plug and play for 1994-1995 5.0 Mustang DIYAutoTune.com






Its 629 plus shipping new.
400 shipped