Thermoquad worth it - or no?

Green, your cost of learning a AFB is time and spark plugs. Have at it. A helpful tool is a 02 sensor.Edelbrock has an inexpensive unit for around $100 I think. Comes with a bung to weld into the collector. (Not the reducer of the header)

Use that to help accelerate the learning curve. Works like a charm. A MOST helpful tool.