I have an mc18 with a blown horizontal all the way to the bearing, the crank seems ok, the 18 is not with me now. I recently purchased 3 mc16 engines complete with the frame but without the computer box. Can the mc16 fit into the mc18 frame? Will the computer box be adaptable on it? the reason is I really like the mc18 and it is a complete bike while the 16 is in bits and in bad shape (rust dents, etc...). Please, help would be much appreciated. thanks in advance