[targa80]

I don't know if the 78 has the same connections on the back of the engine like my 80 has but if it does watch out. I crossed two connectors on the back of my engine after a rebuild. They both go to the CIS. Timing and distributor and spark plug wiring were correct. Tried to start the engine and had a massive backfire with flame come out of the air box thank heaven for the pop off valve. Scratched my head and looked at the CIS diagrams. Found the two connectors and swapped them around. Engine fired right up. In total I believe I have three connectors on the back of the engine. One connector is green and goes to the green plug. The other two looked like they were both red connectors and the plugs looked red. I took a wild guess about what hooked up to what and got it wrong the first time. My engine is out of my car now so when I get home I will take a closer look and post back some more details.