My old school 340 upgrades and results.

Started it up this morning. Have some interesting results. First off don't know why at all but it started and idles way easier than it did before. I revel it up to 2000 and let it break the springs in. After having it running for a few minutes it died. Lol out if gas. Added some gas to the fuel cell and restarted. Starts and idles well. Snaps quickly when revving the motor. Now for the high rpm test. It still breaks up at high rpm. Now this is no load so just for grins I dropped it in to 2nd and power braked it pulled up to 3000 in gear clean. I am starting to think that no load revving is an invalid test. I don't have to opportunity now but I would venture to guess that it will pull clean when in gear WFO. The popping at 5200 was most likely the valve springs but I think I am chasing ghosts by revving in my driveway. Need to get it to the track or at least a deserted road.