Re: SFE 10 & 25 fuse
If you want to replace your SFE 4 fuse with a higher amperage there's a problem with the SFE series. They get longer as the amperage rating increases. The AGA series fuse is the same size as the SFE 4 and is available in 1, 2, 3, 5, 10, 15, 20,and 30 amps.
Be careful because this fuse protects the dash dimmer on the headlight switch. If you have a short somewhere and put in a fuse with an amperage rating too high you could smoke the dimmer. Instrument lamp wires are usually gray 18 gauge and there's one in the radio harness which gets cut off quite often.
69 RS 355 Tremec 5-Speed 4.11's