I am installing a 1950 accessory terminal board and fuse holders as I rewire my car. I have questions regarding the proper fuses to use in the original Bakelite fuse holders. From what I can discern from researching the fuses there are two types of BUSS 1/4" glass fuses available. There are the AGC type that are all the same length regardless of amperage, then there are the SFE type that vary in length depending on the amperage the fuse. I have found 6 antique fuse holders that I intend to install in this project. These holders contain a mixture of AGC and SFE fuses. The puzzling thing is that either the short or the long fuses seem to be interchangeable between holders. Am I to assume the wizards of Detroit engineered these devices to accept either type fuse or would it be an inadvertent oversight? Bottom line is this: Which type fuse did GM originally use? Would there be a problem in standardizing to the more common AGC fuse (of various amperages as required) in all of the holders?