[John A. Simpson]

David

I think the suggestion to try another carb is a perfect idea, nothing more frustrating than trying to diagnose two problems at the same time. If you have a carb with vacuum secondaries put it on until you have the ignition sorted. The HP series carbs, the ones with the choke horn milled off and the 4corner idle system are usually race items. Not that they can't be used for the street but require more 'tuning'. The proper carb depends on use, for predominantly track time you have the right carb. For mostly street maybe a carb with vacuum secondaries, for an equal mix some people like the control of mechanical secondaries, ie: a little spring doesn't decide to open the rear barrels in the middle of a corner. Your driveability may improve with a smaller carb, some people run as small as a 650 on a 'mild' big block for throttle response. A 780 vacuum secondary would be good for someone with out much carb tuning experience. The fact that the engine ran fine for the builder and now is a problem is the real puzzler!

Have you checked (with the engine off, if you value eyebrows) to see if the throttle blades are opening properly, and that the accelerator pumps are indeed squirting fuel down the throttle bores when you manipulate the linkage? Did you check fuel pressure, not too much not too little? Maybe a good idea to check filters on the fuel system.

I'm closing my second mortgage (Cobra mortgage?) Friday morning so I imagine it will be early afternoon before I can get to Provo. I'll have my cell so I can call and let you know as I get closer. Just e-mail me if you want me to call a particular number.

John