After valve adjustment stall issues.

..........Or adjust them hot and not running...........

EOIC.......Do you know what that means?

Bump the engine until the EXHAUST just begins to OPEN, and adjust that intake
Rotate engine until the intake is clear open and bump until the INTAKE is almost CLOSED and adjust that exhaust

ESPECIALLY where you have a low performance engine which 'may' have somewhat weaker valve springs, it can be "easy" to adjust them too tight and since the engine is RUNNING (when you adjusted them) it is easy for the valve action to "make it seem" that the feeler is "loose."
ADJUST THEM ENGINE STOPPED