73 360 Ignition timing after Chain replacement

Plymouth 65 said

Engine timing is pretty straightforward. 2.5 degrees BTDC is not much. 15 degrees BTDC is much more in line with most of my builds like best. Too much timing BTDC and it'll buck as you already experienced. Take it for a ride and get on it, if the motor pings you may want to back off the timing a couple few degrees. 65'

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That's what I figured, but was concerned that it wouldn't even run at the "factory" setting. Made me question whether Cam timing was correct. I hadn't worked on a V8 since my old FE block ford 390, in the 90's.....lol.

guess I'll have to get it out on the road to find out how it runs.

If Cam timing was off a tooth or 2, what would be the resulting driveability issues? no power? terrible mileage?