Where is the fuse box - 63/64 Cadillac Website Sep 12, 2015Greg, there is no fusable link in the 63 or 64 Cadillac's. To locate the fuse box, first get to the drivers floor mat. Find the emergency brake pedal, and look back up too the bottom of the dash, You will see the fuse box poking out past the bottom of the lower dash panel. There is no need to remove the lower dash panel. Fuse box - 63/64 Cadillac Website May 20, 2013Aftermarket fuel filter with return line for '63? Started by Chris Gill in 1963/64 Cadillac Specific Discussion. Last reply by Tony and Ginny 429 1 hour ago. 4 Replies 0 Likes. Hi folks,My car didn't come with the fuel filter so I need to source one with a return line.