My chrome housing started finally leaking this past summer. I got the Napa water neck for $6 and change and used a pink Superformance gasket with it on my aluminum mopar pump housing. No sealant, no leaks. 
'68 Coronet 500 w/ Indy EZ-1 headed 446, 727 trans, 9" rear
First day at the track with SUV street tires and no traction: 1.688 60', 7.24 @ 101.79 in the 1/8 mile
Great customer service from: DominicThumper Carbs, B3 racing engines, Porter Racing Engines, A-1 torque converter's, Quick Performance, Racer Brown Cams, R&R Performance, Manton pushrods
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