I JUST got my project car of six years running and driving. I've put about 50 miles on it. I let it warm up, then took it for a drive this morning, only about 6 miles. It was running very good with no issues. I came home to double check some things and planned on going for a good long drive since it's so nice out. At idle in the driveway, the low oil light came on. Revved engine and light went off. Shut off car, hooked up my OTC oil pressure gauge, started car and let idle. Hot idle oil pressure was low, 3-4 psi. Revved the engine and oil pressure shot up to 50/60 psi. Now, when snapping the throttle I am pretty sure I heard a rod knock upon the initial snap, but the noise went away as pressure shot up. It was a very sharp, metallic, double knock. I snapped the throttle again, I heard it again although not as bad as the first time. This is a stock 1986 T1 in a Shelby Charger. The engine came out of a 1986 Lebaron that was wrecked in the early 90's with 36,000 miles on it. I picked up the engine in 2010/2011 after it had been sitting for YEARS. Shortly after I bought the engine, I tore it down. The rotating assembly was left in, but everything else removed, inspected, cleaned. Oil pump was removed, cleaned, installed per service manual. Intermediate shaft was removed, inspected. Crank and rod bearings were plasti-gauged and all within spec. Everything looked good. Now this was all 5 years ago, but this is the last problem I expected to have with first getting this car on the road. Any input?