Have the opportunity to pick up an engine and tranny from a 91 for pretty cheap, says it ran but ecu is shot and had 200k miles. Pulled and replaced with cummins. Should I snag it? I've got a 92 that was not treated well before me and as I'm getting into it I'm finding a lot of little things that need replaced. Basically what are a motor and tranny, in questionable condition, worth?