I don't know what the hell is going on, but let me try to explain it. First off, my truck's a '80 Bourbon 3/4t 4x4 350ci, T-400, np205, 4.10's, 33" tires, new/rebuilt: tranny, carb (Q-jet), fuel pump, distributor w/coil (HEI), plugs cap rotor, waterpump, alternator, recent (40k) factory rebuild, all filters, timing set @ 7-8 btdc. Now, when accelerating, the engine bogs like running out of gas. Also, went from 1k' to 4-5k' and truck is absolutely gutless (25-30mph up hill)!! And when flooring it, you'd think I was beating the bugeebees out of it. At first I thought about ignition advance: maybe not enough? Then what about carb settings: the guy who rebuilt really is top notch, but leaning out the choke seemed to help alittle. What about a short to the distributor? Already had a problem with the cheesy ground strap inside. I don't know, any help would be greatly appreciated. What about a good analizer in the Portland, Or. area?