I've heard strokers don't like as much timing as the 340/360. I have mine at 32, I haven't messed with it since I installed the engine, Just working on the rest of the combo.

70 Dart Swinger, 2850 lbs
SB 408, Bullet roller 264/268 @50 .636 SSDS stage 2 Edelbrock heads, 1 7/8 Headmans, 1050 dominator by Dom, 9.867 @ 133