408 ignition curver advice

I used to run 32 fixed/locked timing no curve in my 414. Did that when auto trans used to be in there and converter was too tight for cam. Band aided the in gear idle problems. It never had an issue starting locked in at 32 like some say can happen. Once I got a looser converter in years ago I went with 21 initial to 32 total which is what I still run it at. Can burn tires up just on the primaries half throttle; need a lot more tire on the car apparently. LD340 intake Holley 750 double pumper etc.

Back when I had stock 340 open chamber X heads original pistons stock cam ran 38 total. The old school setups like more timing.