what is the most sufficient way to do a swap on a 91 LS 400. The actual problem is that the number 5 cylinder is low on compression. what would be the best way to deal with this situation at hand. Should I change the motor, change the head or just rebuild the head. Worse case scenario if I had to do the engine swap can someone send me a diagram on the entire engine compartment so that when I do it, it will be that much easier.
