[AcesHigh]

Might be misfire. Do the standard maintenance on your car: change your oil and filter, flush your coolant system, get new distributor caps, rotors, spark plugs and spark plug wires. Typically on old cars such as yours, maintenance was neglected by the previous owner and causes a host of problems.

You're wise to get the engine in tip top shape before modifying it.

I've never done a tranny swap before, so I don't really know. I'd think you would need a new ecu though.