This is what happens when you do not change your oil

[Al Skierkiewicz]

Matt,
Thanks for the great pictures. I am guessing that this engine went longer than 10K without an oil change. Probably was running hot as well and may have been sitting for some time without any attention. I assume you are replacing, not rebuilding right? I can imagine what the bearing surfaces on the camshafts must look like. Had a '58 Chevy 235 six, that clogged the oil ports to the top side and siezed the front rocker arm. It broke the rocker arm shaft and just laid it down on the head. Since it was the intake valve, the engine backfired through the carb something awful.