Went racing this past weekend at our 3 day Rally and half way down the track (300 Ft.) the engine dies. It feels like a rev limiter or running out of gas. So the second run it does it again and I let off and put it back to the floor and same thing. I was running in 4 lo. My specs. 90 Blazer, 96 350 Crate with Vortec Heads. Edelbrock Multi Port Fuel Injection, MSD Pro billet distributor, MSD box without rev limiter, I also have a newer fuel filter on it. I did have my tach disconnected so I don't know the RPMs I was running at. I ran this same track last year with the same set up and did well. I still ended up with second but the drop outs are making me wonder what is happening???