Advancing stock cam in a 360?
Straight up on the stock cam.
As far as the crappy starts, the mopar distributor HEI conversion works wonders.
You have to run an E-Coil with straight 12 volts powering it, no ballast resistor.
Hotter spark than the tower coils. Starts like it has fuel injection, along with using the newer mini starter. Mini starters spin faster and rob less voltage from your ignition system.
E-Coil top center pictured below.
Inexpensive E-Coils at Rock Auto. Application use '95 Ford F-150, 2 post + & - spades for easy coil hookup.
Get yourself one of these handy coil leads to go from the e-coil to the mopar distributor cap.
Using this Mopar HEI conversion and E-Coil on the '89 D100.
Starts and runs great, just reach in through the driver's window hit the key, and it's running.
☆☆☆☆☆