Carburetor Question - Is this a good call?

San Diego area should have places with socket head cap screws. I'd least I'd think so with the Navy presence. Pensacola you could even buy AN hoses with teflon liners and have them cut and crimped to end fittings. Point is, ask around. Hard to imagine there isn't something like a Fastenal in the area. But if its easier, order on-line.

SAE Grade 8 is for hex head screws. Won't find the SAE grades for the allen wrench sockets. However at least it used to be all socket heads had pretty high tensile strength. Nothing to worry about. In fact, for what you are using them for, a slightly lower tensile strength would be better. You want enough torque on the screw that the threads slight stretch. That's what keeps them from backing out. With the thin adapter and gaskets, can't use too much torque or it will crack.