cannot answer if in the wrong place, but, you never stated what you are building here. There is little chance of finding a direct bolt in type engine swap for these old puppies. For every mod needed you will likely have to do three more mods that affect other parts of the build for the first part to interact correctly. Your line in the sand on the build will ever be moving. And while I have done a few swaps I would never try in any manner dictate to another person to follow what I did. Each of us have our own set of skill, tools and space to work in. These three are paramount and even with that...I would recommend you set your build down on paper and then NOT stray from the build or make running changes....you will be forever backing up and apt to take the vehicle in a direction that you cannot recover from in means of time, money and function. For me there is a bit more than just upgrading an engine, chassis mods and braking are two important factors one must address also not to mention added creature comforts. You will end up wanting the total package. Also the more modern donor you address the more likely you are going to encounter electronic issues you must be able to adapt.