Suppose an, "in a hurry guy", put his 331 Hemi in the bed of his P/U and didn't strap it down or tie in down. Suppose the headers were on the thing and using 2x4's under the outlets steadied it okay. Now imagine the shop he's taking it to is at closing time, (reason enough to be in a big hurry?), and are staying open until he get there, about four miles or so away. So then the journey begins. Going slow enough, (he thinks), he turns left. Holy crap, the Hemi rolls in the bed first to the right on to its side, then as the corner is completed it rolls upright, then to the left, and then rights its self to the upright position and comes to rest on the damper and the pan. Cussing, he pulls over, checks it out sees no external damage, figures it will ride in this position okay and takes it to the shop for mating with the transmission which was the intent of the trip. The distributor was in the block with out the cap and the intake/carbs were not on the block at the time of the rollover dance move. Now , "in a hurry dummy" after getting the car back on the road is having engine miss issues. He had this issue after reassembly and found a broken plug, presumably from the roll around in the bed, changed all plugs, it ran okay and now it reoccurred again yesterday. So now Mr. idiot is thinking maybe something internal happened when it was dancing around in the bed. I...........err.........he can't imagine what that might be. He's headed to the shop to go over the cap, wires and look again at the plugs. A thought that it could be the "Hot Heads" electronic distributor passes through his mini brain, but then it starts and maintains speed on what he believes to be seven cylinders. It starts and runs good, and it made about 20 miles back and forth at freeway speeds yesterday, with the miss pretty prevalent. So............could it be something internal causing the miss? If so my buddy really has a need to know. Maybe he needs to take up another hobby. I've mentioned knitting a couple of times, but he says needles scare him.