Dear Steve;
Two things come to mind here.
First: If you have an 'in line' fuel filter make sure It's on facing the correct direction and that It's clear. Simply remove it & blow through it.
Second: Put a 'dwell meter' on your distributor and see if the dwell changes (a lot) when the speed is at 2,000+ . The worn bushings mentioned or a bent shaft will do this.
Good luck.
