Thanks, that gives me some direction. Do you know if I need a VSS? I do have the th400 but no VSS. I am getting a code 24 when I decelerate quickly then get back on the gas slightly. It also seems to...

Hello,
I have a 1227747 ecm with the chip marked as "ADUS". This is in a street rod with early to mid 90's 4.3l that has vortec heads and TBI that the previous owner said was from a C or K van, but...