I have a 94 Aspire that needs a new engine. I'm needing advice or tips when I go hunting for one in a junk yard. I don't want to spend over $350 and would like to find one on 75k, and I'm planning on changing timing belt, water pump, timing tensioner before I put it in and major tune-up after and if I can afford it a Auto-RX or just a M1 T&S 5w-40 treatment. All the ones I've looked at are already pulled so I can't hear them run, should I just pick one close to my specs and hope for the best?