We've used Push-lock hose for straight methanol fuel on supers and sprints for years. Personally, I stick with the Parker (Push-Lok) brand hose for several reasons, but it has "ugly" colored writing all over it... Aeroquip is also very durable, but has a different look to it. I've used the Earl's super stock hose before, but never for fuel. The JIC stuff usually has a smaller ID than the "hot rod" AN fittings, but I have found them to be a VERY durable option in places.
The use of AN stuff started to become popular when it became available as surplus. Although AN stuff was around, early hot rods and race cars more often had traditional automotive, industrial, and hardware store type fittings.
Back in the '60s I remember learning about AN fittings from my buddy's WWII vet dad, and an old rodder. The fittings he was putting on my buddy's '57 from his parts stash were red or blue, but much of the anodizing was worn off. So I guess that makes them traditional in my book. I used them on my hemi with blue hose, but I do not ever want to use the stainless braided stuff. ...just personal taste.
Safety first, and AN provides that. I was a B-52H crew chief and that aircraft had miles of the stuff. I "borrowed" some for a buddies 428CJ I was plumbing. ( yes it was leftover, the plane didn't fall out of the sky )
Probably because it's in Ryan's list of guidelines for the group. .............. 3. Gotta easy question? Try using the search function first. .............. Not jumping on you, just answering the question. Larry T