Today I started up my 74 c15 for the first time since 1999. Motor is a 250 i6. My son and I changed the oil, filter, put marvel mystery in each cylinder, fresh fuel in a small tank we hooked to the fuel pump, and new coolant. Pulled the distributor cap, gap was good, remarkably no corrosion. Turned the motor over by hand a bunch to hopefully get some oil on some dry parts. Didn't have to turn over to long before she fired off, was awsome to see. Now lets pray she doesn't spin a bearing. I don't plan on keeping this motor in the truck, but it will be cool to drive around for a little while.