I pulled the carb off today to go over it entirely.........Float was a tad off(Maybe causing the rich problem at idle), and I found that it has the stock rods in it(#6552) and jets are stock(.086" main #1423). I also moved the pump rod one hole towards the carb body, to see if it helps my hesitation on the top end.

My question is the setup springs.......I did get a set of them with the carb, and the ones in it now seem pretty weak. Would weak springs cause the lack of power on the top end? From what I can see in the manual, a stiffer one would help hold the metering rod up. What do you guys think?

Love Old '67-'72 GM Pickups! Dare to be different.....Running GM Inliners, GMC's MONSTER V-6's, and real inline power, Cummins, in Central PA.