I have a ecm and 3 of the piggy back burn off modules(2 are good, one is bad but they are all together and I am not sure which one is the bad one. Its been a long time since ive seen them) and a descreened maf. The maf is a replacement from advance autoparts(i think) and the ecm is a replacement from Napa and the burnoffs are original GM. These are parts from my old 85 when I converted over to the 86-90 maf system to better tune my 406. 100 shipped for all.