Thermoquad question

The 71-74 TQ are the best to use, Truck TQ were affected later as the emission requirements came in later for them. Some TQ do not even have ported vacuum for the distributor vacuum advance. They do require a choke to start or they will drive you crazy.
71 is press in jets, avoid unless you need to be date correct.
The electric choke helper in 73 and up helps it work better, because the choke needs to be pretty close to fully closed for them to start quickly.