Just when I think I'm finished with something, I'm not. I finally got my car "finished" after 27 years, drove it about 40 miles, and got some disturbing noises. So, the engine is a 383 Chevy that I was told only had a few hundred miles on it. I believe that is likely true because I swapped the distrib, intake and valve covers and what I could see still looked new. I am unsure how correct these specs are as the engine builder's original estimate and a few of the things I was told by the guy who purchased the engine don't quite match. So I don't know if the original purchaser was full of it or if he opted for some better components(I know for sure the rockers are aluminum roller instead of stamped steel like the estimate).. But, here goes: ARP fasteners Scat crank and rods Speed Pro H860CP flat top hypereutic pistons(was told 11.4:1 but website says 10.4:1 comp) Michigan 77 bearings Speed Pro cam .510/.533 lift 308 duration(was told hydraulic roller, but the original estimate lists this cam) Speed Pro true roller timing set 5 qt 'cheater' oil pan w/2 trap doors and crank scraper Melling HV oil pump Roller rockers(estimate lists steel Elgin rockers, but they were clearly aluminum rollers when I changed the valve covers. That's what leads me to believe the original purchaser really did opt for a few better internal pieces) Patriot aluminum heads w/2.02/1.60 valves, guideplates, .575 springs Weiand Team G intake with carb spacer Mighty Demon carb(can't recall if 750 or 850 cfm) Pertronix Flamethrower III dist and coil with Accel wires and NGK plugs Edelbrock fuel pump(I think Performer RPM but can't recall for certain) High volume iron water pump(can't recall now if EMP or FlowKooler), steel fan w/clutch, fan shroud Now, my issues. I got the car together and drove it a couple times but never wound it to more than 4000 rpm. It ran/sounded good. Was running 205 to 210 degrees. Oil Pressure was 45 to 50 pounds cold and 22 to 25 pounds at full operating temp. The 3rd time I drove it, I got after it a bit. I was shifting at 5500 rpm or just under. It ran strong but died when I took my foot off the gas and clutched it. Weird. I let the clutch back out and it started back up and seemed to run normal again. However, I looked down at the temp gauge and the temp had jumped from 210 to very nearly 230 in about a 1/4 of a mile. Once I was keeping the rpm down, it cooled down to normal in 3 or 4 miles. The worst thing, however, is this. I noticed when I was decelerating, I could hear the engine making an unhappy noise. It sounded kind of like a 1/4" nut in a small soup can. Oh crap! Now what? I checked the oil and antifreeze when I got home. Both were at the appropriate levels. There were 2 little specks on the dipstick the first time I pulled it. I have started it once since then just to have another listen. Same sound and I can only hear it when the rpms are coming down. Pulled the dipstick again and there was a small amount of black stuff on the tip(about 1/16" diameter, almost like grease). So, that's where I'm at. It doesn't sound like rod bearings to me. It also doesn't sound like the vehicles I have had in the past with lifter troubles. Any help is greatly appreciated.