I made one of those sockets out of a large nut and bolt with a welder and an angle grinder. It has a screwdriver blade on one end and a big hex head on the other. I use a socket on a 1/2" air ratchet to back them out.
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission