ECM has been converted for full tunability with be EBL P4 Flash system from DynamicEFI. This is a real time tuning setup and also has the ability to auto tune as well in closed loop. This is a great, easy to use system. This will also work with a 7730 V8 Multiport engine harness and is plug and play.
More info on the P4 Flash system can be found here:
Asking 450 shipped