As you've found out, the AN wrench is for the B-nut, not the socket.
-6AN is an 11/16" wrench. The next size up -8AN, is a 7/8" wrench.
When assembling the hose end, it's common practice to wrap the
socket or wrench/vise with masking tape, to avoid scratching the fitting.
http://www.holley.com/types/Wrenches...20Spreader.asp (AN Wrenches)
http://www.holley.com/data/TechServi...ly%20Chart.pdf (B-Nut Size Chart)
http://www.holley.com/types/Vise%20Jaws.asp (Protective Vise Jaws)
http://www.youtube.com/watch?v=ZcaTJ8fngSw (B-nut vs Socket Sizes)
May God's grace bless you in the Lord Jesus Christ.
'92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.