[aldolente]

I just had my 3.0 long block re-built. The heads were a mess and needed springs, valves, machining. New rings, bearings, gaskets. All cams were re-ground and crank magnafuxed. Other than the cams , pistons and crank and case, everything else was replaced with new.
My total cost was over $7,000. The head work and machining is what killed me.
Otherwise, $4000 to $5000 will get you a long block re-build here in Florida.
Do not buy a car unless you get a compression and leak down test. have the mechanic inspect all the studs and check for oil leaks. Do make a mistake like I did. I am spending thousands more on this car than it is worth.