rebuilt engines are only as good as the parts they use. that said the major auto parts stores use sub standard parts on their rebuilds, so they can rebuild at the highest profit margin. a certain number of failures are figured in to the profit margin. btw they don't actually rebuild the engines, that job is subcontracted out to the lowest bidder. I don't know about dodge and ford but gm does not do rebuilds, the engines you get from them are brand new. the last time I checked a 350ci went for $1775.00. so I could write on this subject for pages and pages but I will not. the most important thing is to trust the shop/person doing the install. when a new/rebuilt engine is installed everything that goes with the engine should be replaced. all hoses, water pump, radiator, complete tune up, starter, fuel system, pump, carb/fuel injectors rebuilt, all sensors, etc, etc. if you do this whole system rebuild on everything thing in your vehicle, you will enjoy years of trouble free service. this is what I do on older vehicles makes them like new. highdesertranger