Will an 1100cc exhaust manifold work on a 1275cc? My 1961 Bugeye has an early 1100cc with very nice headers system. I have thought about going with a 1275cc. If it means a new exhaust system, then the 1100 cc is going to stay. The extra power would be nice, but as of now, I have all the power I need, especially with a rib-cage trans and a 3:92 rear end.