Have older Chevrolet with points distributor and have a HEI distributor want to fit HEI WILL it need anything else to work can I bolt it on and time it in does it need a module or justcoil ok?

i have a 1972 nova with a points distributor. I replaced it with an hei i had laying around. i opened up the spark plug gap from .035 to .045 to better utilize the increased voltage of the hei. i ran a wire directly from the battery to the hei(through a switch on the dash to turn on and off) as i knew that the points distributor wiring would limit the voltage(something about a resistor wire or ballast resistor) The problem i had was that the engine didnt idle well with the hei as it did with the points. however the hei ran better through the rpms(up to 6000rpm) so im still trying to research that problem Some motors will idle too fast/rough at manifold vacuum, in which case you will need to connect your vacuum advance to ported vacuum.