ok guys this is my problem i have been battling for about a year now... i have a 1995 k1500 rcsb 350 tbi auto.. headed uphill kick it down a gear, rpms 3k or so cuts out and starts the stumbling, shifts into od still stumbles untill i let off the pedal. thats running about 50-60 mph. on the hiway it will do it every so often at 75+ mph. and if you really mash on it runs light a bat outta hell to 80 or so the starts to stumbling bs... this is what ive do to it so far, both injectors, fuel presser reg, fuel pump, map, cap rotor plugs wires, fuel filter, cat removed coolant temp sensor, pcv valve checked all vac lines look good. engine is all stock with flowmaster muffler. trans shifts great. front end tight. im pulling my hair out. truck has 155k new engine at 99k by gm. any help will be awesome. i tired of chunking parts at it....