Engine: Chevy 305 Crank and Pistons: 20cc dished, Stock Recently rebuilt, very solid Heads: New 1984 305 HO heads 1.92 int, 1.5 exhaust Intake: New Edelbrock Performer RPM series, 1500-6500 rpm Carb: New Edelbrock 600 CFM Exhaust: Hooker 1 5/8" headers, 2.5" exhaust single muffler Distrubtor: New MSI HEI Cam: Comp Cams 280H - .48" lift, hydraulic flat tappet, came with springs. rated for 6500 rpm, 2500 stall Stall: stock 1300-1500 rpm. Rockers: New Roller Bearings Problem Car requires much more throttle than before to idle. Will run decent out of gear, but will randomly stall and die after 10 seconds or an hour ( very random ). Seems to be slightly misfiring when no load is on the engine. When load is applied it stalls. I have to power brake and can barely stop in order to keep it alive, unless I constantly put it in neutral when going less than 10 mph. Power will randomly drop between 4000 and 6500 rpm, then sometimes after half a second picks back up for 1000 rpm. Seems sluggish. Sounds healthy in high rpm, and revs very well. Vacuum is perfect. Carb is brand new and works great. Heads are brand new and perfect. Distributor is new and adjusted spot on. Fuel pump isn't perfect, but get's the job done. Rockers are perfectly adjusted. Stall is stock but should not be causing this. I can only think of two possible reasons for this. A: The distributor is off a tooth or two. Now how this would effect anything is beyond me, but my latest shop guy suggested it. As far as I know, as long as it lines up with the oil pump and slides in you are fine, then set the ignition timing right. He says it would make a big difference. Could this be a possibility with my symptoms? B: The cam was either installed off a tooth, or else the chain has slipped or skipped a tooth. When I installed the cam, I was sure the dots lined up and I double checked a hundred time, but I still doubt myself sometimes. I reused the chain that had been put on 2 years earlier because I didn't want to pull the crank gear, and the chain seemed to be in perfect condition. Could this be a possibility with my symptoms? I have been plagued by this for 6 months, and I know my engine has far less power than it should and it runs like pooh. It's much harder to drive than a manual right now... and it's an automatic. With it dieing randomly in traffic, it is a safety concern as well... as I experienced today. I'm angry.