exhaust manifold swap

[SB <polecat2@xxxxxxxx>]

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


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