starter issues

[Ham-er]

Uh huh, something definitely hanging-up there. I can see 2 possiblilities.

#1 - exactly what big daddy said, meaning mechanical misalignment.

#2 - Famous heat problem with chevy starters, The cooper disc inside the solenoid is a part of a high ampereage relay built as part of the solenoid, When they get hot they tend to weld themselves up and stick.

In either case get a new good starter, make sure it is fitted right (shim if necessary), AND use a starter heat shield.

If you do all of this and the wiring is correct you should have no more starter problems for a long time!