Truck is a '97, 383 vortec base. I wired up an Edelbrock Pro-Flow MPFI which is working fine, 0411 PCM. I have hacked into the wiring harness so many times now, I cant believe it still runs.. No A/C, EGR, Cruise, Antilock, airbags, Mass Air, only essentials; also T56 swapped... Pretty basic at this point and everything removed has been unpinned from the ECM. I have been dyno tuning every time I mess with anything and its getting to be a PIA (and costly) also, my ODBII is not functioning properly now.



Leaning to the Holley Terminator/dual sync distributor and CD spark box. Anyone running this set up on a vortec base?

 

Never done one on a Vortec but have done some big block chevys and a few hundred on LS's.
Stock PCM has its place but once you go to a holley you wonder why it took so long.

 

Hit up the Holley forums, Danny over there is a huge help.