"starter works. oil changed. radiotor has no major leaks, just the heater hoses need replaced. doesn't start"
does this mean that you actually got the engine to crank over with the starter? or does "doesn't start" means won't crank over?
sounds to me like there's nothin stuck that you need to be dumpin more MMO or those other things in the cylinders, which will not make it start more easily - to clean out the oil pan flush it w/ diesel a couple times
Bill