Anybody looking for a good C4 ECM replacement(non LT-5) can look here at
www.dynamicefi.com. Works w TBI, TPI, and MPFI. Provisions for forced induction and NOS. This actually competes with FAST, MS, and Big Stuff.He has one for GNx applications. The neat thing is that he uses GM code on a GM ECM motherboard. I have begged Bob to do something for LT-5s to no avail so far.