I bought a 65 C10 about 3 months ago, it as a rebuilt (45000 miles since rebuild) 350 pulled from a 71 Nova SS, and a four barrel edelbrock carb. The previous owner didnt treat it well, evidenced by the pitch black oil that came out as soon as I got it home, but it has run strong since I have gotten it. The only problem is when at 3/4 to wide open throttle, the engine stutters as if there isnt enough fuel being delivered. I live in Colorado, and haven't retuned the carb since I drove it from Kansas, so the carb should be running too rich. Any ideas to solve my problem?