I picked up a 1965 C-body Fury that someone put a stock, two barrel 318LA in. It also came with a new dual exhaust system installed, but the pipes are too big to seal well to the tiny 318 manifold flanges, and they leak like crazy. The openings are sort of funnel shaped, and don't use gaskets. I'd like to swap in later 360 manifolds, which dump in the same places, but have larger flanges which would seal great to the pipes. Will these 360 manifolds, which are larger, have bigger head ports, and larger openings have any negative impact on this engine? Or should I get smaller front pipes that fit the 318 manifolds? thanks ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.