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bearing may also be on its way out....did it fell free and smooth?
^yup.....old school cap and rotor go with wires, for some reason new school does not
dump some gas down the tb, if it runs it confirms lack of fuel, coolant temp, oil pressure switches can shut down the pump
how did you confirm...
should be able to pull lifters with a decent magnet, think what i saw on cyl is just a funny carbon pattern
front cyl looks damaged?...pull a lifter and check the lobes on cam, they look lower than they should be
some gms have an extra 2 from the factory
check the intake for vac leaks
dont waste your time with used,....use ultra bend to make a new steel one, or high pressure hose (pricey)
regular gear oil, with additive if posi traction
make sure the stripper you use is ok for rubber if the tires are on! i bought a kit with stripper and polish, sanded with 2000 wet paper after...
2 cycles of the cooling fan