I guess its a lot easier to post 3 or 4 pages of nonsense on teh internet than spend 10minutes to go to the garage and simply lock out the HEI's advance system so it cannot move, by binding it tight using two common plastic Zip ties,
and stick the rotor back on. Stick the weights and springs in your tool box.
reset the now fixed locked timing to 36deg BTDC and go for a ride.
It is just that simple.
Or .... you need a cam,, you need a dyno tune,,,, you need gears.... yad yada yada.
10 pages later