I purchased a 3-72 FJ40 here last August and the previous owner had done the Weber carburetor swap. I have the original Aisan carburetor and want to return it to stock. I was wondering, is it worth it to swap it back to stock? If so, what are the benefits? Also, where do i find rebuild kits? It is a 2-72 carb. (I'm a new-comer.)