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V · 06-10-2010, 11:06 AM

i believe the ecm swap compatibility is 85 alone(due to maf and maf burnoff relay), 86-88(maf), 89(due to VATS and MAF), and 90-92(Speed density) edit: 85-86 may be the same, i forget)
and then youd have a prom for 305 or 350.

TBI in the later years has a different ecm as well(lo3 motor), same with the CCquardajets (lg4, l69)

and the v6 also have their own depending on 2.8 or 3.1

doesnt apply in your case, but a side note... 90-92 speed density TPI cars use the came ecm as the 90-92 3.1 V6 cars.. just a different PROM(chip)

06-10-2010, 11:06 AM	#24
V Stalker Join Date: Aug 2004 Posts: 12,082 iTrader: (12)	i believe the ecm swap compatibility is 85 alone(due to maf and maf burnoff relay), 86-88(maf), 89(due to VATS and MAF), and 90-92(Speed density) edit: 85-86 may be the same, i forget) and then youd have a prom for 305 or 350. TBI in the later years has a different ecm as well(lo3 motor), same with the CCquardajets (lg4, l69) and the v6 also have their own depending on 2.8 or 3.1 doesnt apply in your case, but a side note... 90-92 speed density TPI cars use the came ecm as the 90-92 3.1 V6 cars.. just a different PROM(chip) Last edited by V; 06-10-2010 at 11:10 AM.