I am looking for a mechanical fuel pump for 1974 GMC Sprint, 454 bbc, ac, 400 auto. Cannot find source for one and do not want to go to electric pump. Have checked around with no luck. Called Airtex, direct, they have none. Anyone have a source or idea. For what its worth, my issue, concern is I have a strong fuel smell when you crank it up and it looks like there are weeping stains on fuel pump but you can not see any fuel leaks with hood up and reving engine, but once again a strong fuel smell. Thanks.