I'd check the timing, with a light and bridge the jumper, search the site if you don't know how to. It could also be mechanical timing, you'll have to pull covers and manually rotate the engine to check the markings, again search above.
"I only drove it a little" doesn't matter, if the mechanical timing is off enough it can bend valves on the first startup.
"I only drove it a little" doesn't matter, if the mechanical timing is off enough it can bend valves on the first startup.