My kid wants to be a mechanic and someone gave us a '86 cressida for him to fix and hopefully drive to work. It was overheated and has now sat for 2 years. it runs fairly smooth, has pretty good power but smokes, especially after initial warmup. The cylinders test 170,170 170, 50, 145, 170. Wet test on #4 and #5 give 90 and 275 psi. I looked at some archive postings about overheating and some say head warping or maybe a crack between valves. It sounds like the head needs to come off at the least. Is the head the most likely casualty or could it simply be just the gasket? The motor was rebuilt once and has 110K. Is this motor worth repairing?