Cam help from Engine builders

[PbFut]

I just fired a 1st Gen 350 after a top end rebuild. All vacuum ports temporarily capped to eliminate external failures. No vac advance... plugged at this time. Flat tappet hydraulic lifters. I preloaded with ½ turn more at zero lash. Barely could start the motor. Backed off preload ¼ turn. It helped but things are not right. Engine will barely run at 25ish degrees of timing advance. Vacuum is low while in the idle range and comes up a lot when engine is in the 1500-2k range. My suspicion is that I missed, by one tooth, when installing the cam timing chain and the cam is too advanced. Picture of cam card for reference.
I was looking for that old fashioned thump without compromising street manners too much.
Am I on the right track relative to cam degree or is there something simple I am not considering?