Very old post but I found this adapter for blade fuse.
It's very expensive now but easier to change fuse after you put this adapter.

At Jegs :
http://www.jegs.com/i/RestoParts/759/CH30265/10002/-1

or here :
https://www.opgi.com/skylark/CH30265/

[img:center][/img]

70 Challenger, A66, 340 ci