Old Honda I just got
 

Hey guys, I'm restoring a 1974 Honda XL250 Motosport. Now what makes this post interesting is that everything on the bike is stock for the 250cc bike except the engine block which is the 350cc engine block. I took it into a licensed Honda repair shop and they didn't want to work on it because they were worried that with the engine and frame being from two different bikes maybe more on the bike could be from different bikes, so they suggested I just get the bike running right now. My question for you fellows is, will the 250cc wiring harness work for the 350cc engine block and will the 250cc exhaust manifold work for the 350 as well.