bc65riv Posted November 10, 2017 Share Posted November 10, 2017 Will 1964 425 exhaust manifolds fit on a 1965 401? Any problems? Link to comment Share on other sites More sharing options...
RivNut Posted November 10, 2017 Share Posted November 10, 2017 The attached link has a complete listing of nailhead exhaust manifold casting numbers along with the years for which they're applicable. You should be able to figure out what you have and see if it's applicable. https://www.teambuick.com/reference/casting_numbers_nailhead.php Ed 1 Link to comment Share on other sites More sharing options...
Alpha*Male Posted November 10, 2017 Share Posted November 10, 2017 You looking for 65 401 manifolds? Link to comment Share on other sites More sharing options...
bc65riv Posted November 10, 2017 Author Share Posted November 10, 2017 Yes Link to comment Share on other sites More sharing options...
telriv Posted November 10, 2017 Share Posted November 10, 2017 YES, the '64/425's will fit the '65/401 Link to comment Share on other sites More sharing options...
RivNut Posted November 10, 2017 Share Posted November 10, 2017 Driver's side manifolds all appear to be the same. There are two styles of manifolds for the passenger's side. One style has an intergal heat riser, the other style has a bolt on heat riser. But they'll both fit. Link to comment Share on other sites More sharing options...
bc65riv Posted November 13, 2017 Author Share Posted November 13, 2017 Thanx Link to comment Share on other sites More sharing options...
telriv Posted November 13, 2017 Share Posted November 13, 2017 '62 & earlier had the integral heat riser to my recollection. Tom T. Link to comment Share on other sites More sharing options...
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