Wayne, Ialso have a problem like you. In april of 2000, first time out with the car for that year I had a rod bolt let go and holed the
oil pan. The motor was a 454 using a 428 crank. Being that it was so early in the year I did not want to wait around to locate a crank and have pistons made. I located someone who had the parts in stock they would not sell them seperatly but said if I sent them the motor they would rebuild it. Ever since I got the motor back now 484 in its gone through more
oil than the exon valdez avg. 200 miles a qt. I called the people but got the runaround. After my lsst three calls with no returns Igave up on them.
Ive done everything to try and locate the problem. Leakdown test,pvc system ,numerous valve seals checked for pressure in the crankcase and tried different manifolds. All to no avail. Its not that I dont know motors. I raced fuel dragsters for seven years and always did my own engines.
Finaly this fall I pulled the engine to find two dimples in the cylinders,the worst one in #7 the other in #1.These were the cylinders that were showing
oil on the plugs,#7 would foul between 600 to 700 mi. These dimples sometimes occur when you seize a motor. The engine shop should have gone larger on the bore but pbably only had that one size in stock which was a weird size 4.258. The worst dimple was only .002 deep so we honed the block to 4.263, .030 over. What I think was happining was even though the dimples were way down in the cylinder they were still above the rings at BDC and would pick up oil that was in the dimple and push it back up Anyway thats what I think the problem is and am in the process of having new pistons made.