Before you do anything have you checked the vacuum modulator is working ? Make sure its getting a good vacuum. They are quite cheap and easy to swap...
Looks like hours of fun to be had! Kinda odd, to me anyway, that engine test stands aren't much of a 'thing' here certainly when compared to the US....
had a bit more time on the run stand today. we got the gauges, ignition switch, solenoid, battery tray and clamp and fuel 'tank' tray and 'clamp' all...