Tom brings up some good issues with the intake and missmatch. Try the new carb with one of the stock intakes, or better yet, try the existing carb on a stock intake, and see if that will make the difference?

Or if your just going to keep the new carb no matter what, go for that. Usually a spacer is a good thing, but in the right combination and application. So try that on the stock intake first if it fits, and then try it with out...

Try a few combinations to see what works best for your set up... If you keep the Holley, I might be interested in the old carb. Just looking for something cheap to toss on my truck to get it going.

Anyway, keep us posted, would like to hear the results! Thanks and good luck!

Brett - 67 Drop Top 455!