Timing Curve on 360 in an RV
Most small blocks run well around 12-34, for timing.
Set your all in timing at 34, with vac adv plugged.
Now check your initial timing. What's it at ?
Also with your heavy vehicle, you want your timing to come in a little later. Say 2500-2800 or even later. Perfect use for a factory distributor, with stock springs.
Cool RV by the way.