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Originally Posted by hinoonaz
Not worth changing cam. Want to keep the lope forever. Thanks for the info . The engine is running well within a couple miles here in AZ from cold start.
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I have a friend that had an engine built by a shop that specializes in dirt track engines, although they do other builds as well. Hate to say it, but the engine is a bit of a mess. They ported the heads massively, stuck in a large cam, and did everything to make it not a streetable engine. He had the same problem as you. I guess they forget the difference between building an engine that runs continuously at 6800 - 7000 RPM for a specific amount of time in a race versus an engine that sits at stop lights and has to be driven in traffic.
What did help a lot with his stumble was going to a Proform main body for the carb and using annular boosters. I got rid of the stumble and increased performance. They were around $200 at the time.