Pinging

It's gonna run like junk at idle for now, dial it back to 34 total without vac advanced hooked up and take it for a drive. If it doesn't ping, twist a bit more in and see what happens. 34 is usually a pretty safe place for timing an open chambered SB engine.

You can alter the mechanical in the mopar distributor. Some are easy, others are harder. You have a welder so you can do the harder ones.