I think I would, if it was my project, go with the '7747 ECM. I would use a Vehicle Speed Sensor (VSS) because of the 700R4 TCC controls require the VSS! I'm thinking there will be a need to add some wiring for the 700R4 TCC, because the '8747 did not have 700R4 TCC wiring? The EBL has some advantages, no chips and better spark / fuel tables than the '7747. For the money, the '7747 is the budget option.

dave w