You will have to fabricate/design engine mounts for the bigger trucks, but there are generic kits online that you can cut to length, weld together and bolt in that work great. If you keep the 4 speed then you will be set in the rear with the factory bell housing mounts. If you go auto, there are generic cross members for that as well that bolt into place depending on your transmission choice. Very easy if you are a good planner. Measure 10 times and cut once. Make sure your engine is as level as possible etc.
