I just bought a 96 Tahoe and I really enjoy the truck. It would seem that at 238xxx the heads are getting a bit leaky. I wonder if it would be better to have the engine worked over and gaskets replaced or if it would be more beneficial to just swap out motors? I wanted to consider options for a possible upgrade but don't know where to even look. It is a 4x4 truck so any upgrade would have to be compatible there. What would even be considered an upgrade to the 5.7? I had a yukon of the same year and really liked the performance of that truck. How likely is the difference in overall performance a culprit of a tired motor? Any advice or ideas are welcome and appreciated.