Good job following directions. The 145 is low but not to be considered out of bounds for an engine not running well. I give the compression at this point a B grade. If the oil seemed thin, it is probably multi viscosity oil like 10-30. That oil stays thin at cool temps. If there was no coolant in the bottom of the pan when the plug was opened, I think the internals and gaskets are good enough to get it running correctly before replacing the head gasket, or going further into the interior of the engine. I ask you to consider leaving it together enough to start and run until the engine is stable and running cleanly. The compression indicates it can do that. A single place that can cause dramatic issues with spark timing and running condition is the distributor shaft bushing. If it is worn, the distributor 6 lobe cam will be wobbly and fail to open the points correctly. The test is to see if it will wiggle by hand at all. Take off the distributor cap and rotor. With good light on the rotor shaft, look at the point rubbing block and cam. Wiggle the cam toward the rubbing block and away from it. Also up and down, and toward the block and away from the block (not in and out). Any play in these directions at all is not allowed, and requires a rebuilt distributor. A dial indicator placed on the shaft perpendicular to the shaft should not show more than .001" of movement as the cam is wiggled. Keep doing tests, we are saving you money and giving you context specific education at the same time. Jim
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Today's Featured Article - The Great Escape - by Dave Hollrah. It all began Monday with a little baling of second crop on the lake shore field, and as I drove out past my sister and her hubby's place, this small calling sound could be heard from the general direction of their manure pile. Out of the yard, over the cows and bale piles, through the dozer piles, poplars, and brush, out onto the ditch grade road, past the noisy 6.2 diesel engine pulling my well traveled Suburban along. Well it sure didn't take me long to figure out what it was because I alrea
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