I am really close to pulling the trigger on a 1960 F-100 with a 223 I6. The floor is completely rusted out, and the driver's door needs some serious work, but other than that, it is surprisingly rust free. The only bondo is on the bad door, the cab supports look good, and bed only has small rust through near the cab.

The 233 starts right up and runs pretty well. I took it around the block and it shifts through all the gears, but I did a compression test, and 1-2-3-5-6 had between 85 and 90 lbs of compression, and #4 only had about 25lbs, so it needs a rebuild. It looks like a rebuild kit consisting of pistons, rings, bearings. cam, pushrods and all the seals and gaskets is around $650? What should I expect to pay for machine work?