Just installed a Wilwood front disc brake kit on the Chevelle. It came with the adatper fittings and braided flex hose. Hoses were 14". Little too short, so I went to the local speed shop who stocks Russell brake lines. Got an 18" set.
Both the Wilwood and the Russell are described as -3AN to -3AN straight hose. Looking at it, it appears the Wilwood is a 45 degree AN fitting and the Russell is a 37 degree AN fitting. Is this possible? Isn't there a standard AN fitting angle??

AN fittings are 37 deg , i have the same set up wilwoods and russell powerflex braided hoses -3

Steve,
Whose caliper adapters and "flare to -AN" adapters do you have? Wilwood or Russell? I swear the Wilwood looked like 45*.

Historical footnote: AN was the WWII developed hydraulic connection to alleviate the leakage issues from the old school 45 degree which had been around since the industrial revoluation and juice brakes. When I was installing my KORE3 C5 brakes I was researching flaring connections for my inline prop. valve. AN designated "Aviation/Navy" I believe. All airplane mechanics are very familiar with all things AN as they cost 10X what the -37 flare parts do.

There's lots of standards; just like there's lots of standards organizations.

AN (which so far as I know is short for Army/Navy, but is now an obsolete term) is 37 degrees. Far as I know, the standard formerly known as "JIC" (Joint Industries Council???) was also 37 degrees--although--I'm sure that there is some minor changes so that JIC and AN are not 100% compatible. As I recall, the AN standard was more specific and more strict, so AN could substitute for JIC, but JIC wasn't approved for AN. What was called JIC is now an SAE standard--J514. If the Wilwood hoses are described as "AN" they're 37 degree fittings--or--they're not AN.

There are also very similar 45 degree flare connections; common in agriculture, trucking, and industrial uses including refrigeration. Again, there's an SAE standard that covers this-J512.

Just to make things interesting, in the common sizes--Dash 2 through Dash 10 (except for Dash 6)--the THREAD sizes are identical between the 45 degree and the 37 degree fittings.

MOSTLY (there are exceptions) you cannot use a 45 degree hose end on a 37 degree fitting--and the other way around. A few hose ends are actually radiused instead of flared; they'll work equally poorly on either 37 degree or 45 degree fittings. I have seen a lot of trouble with the radiused hose ends cracking--probably a matter of over-torquing--but I'm still going to avoid them if I can.

EDIT....
Well,
I already have them on there and bled the brakes. Then I looked at the Wilwood hose I removed (the 14" hose that was too short) and it looks like 45* instead of 37*. I have not driven the car yet so I am removed one side and checked the angle.......you guys were right. I'm a bonehead. It was all 37*. Now I have to get the wife back in the garage to pump the brake pedal so I can bleed the brakes again. :sad:
Well, at least I'll have peace of mind.

Now I have to get the wife back in the garage to pump the brake pedal so I can bleed the brakes again. :sad:
Well, at least I'll have peace of mind.
You opened the hydraulic system down low, near the wheel cylinder. Gravity bleed. One person...you don't have to tell your wife...

Gravity bleed.....so just crack the bleeders on the caliper and let it flow?

yeah crack it and let it bleed.
close it off, crack it and let it bleed. do the same for the rest.
after i think all the air is out, i pump it myself, then repeat.

good luck.

aaron