Stop in for a cup of coffee

71340Duster said

I had an issue like that once in that rpm range but totally different system, TBI on a Chebby and it was the TPS, had a flat spot.

Click to expand...

So, this is a tunnel ram and twin 660 Holley center squirters. Mostly race carbs that have been outdated forever. Trying to make them work, and they really do, just need to get them tuned.