Heads up, this information may be of interest only to those who want to use a modern configuration wiring harness and keep the original steering column.
I interchange the word "pin" with "connector".
There isn't a pigtail available on the market that will connect to the 3 7/8" plug of the turn signal circuit of the 910-64022 wiring kit. The kit is originally made by American Autowire (AAW). AAW does make a 1955-59 Chevy/GMC complete wiring kit but here again the kit is for an early GM steering column (1969-74) with the same 3 7/8" plug. If you want to keep your original steering column, AAW provides an adapter (basically the opposite gender plug) but it is not prewired. You cut off the old wires from the 1955-59 plug of the turn signal switch and crimp-on the provided connectors that push into the adapter. You could simply hardwire the connections and not use plugs but if you ever needed to do maintenance on the assembly, it would be nice to simply unplug the connection.
Jegs has a kit 555-10408 that includes the parts needed.
Crimping connectors on wires is an easy task as long as you have some kind soul to show you how it's done. For a good crimp you need a ratcheting crimper ($100+ ones like Amphenol are an overkill), with a die, made for the specific crimping diameter. Too small and you shear the connector off. Too big and the wire will fall out. Some other gotchas. Don't crimp the connector around the wire insulation. You have to put the correct wire in the correct position in the plug. Once it clicks in place, it can be difficult to make it release to get the wire out (I use a flattened paper clip to depress the locking tab).
The plug that is physically mounted inside of a 1969-74 steering column is a male housing plug that uses male connectors. This is is the style plug (like the one from the Jegs kit) that will now go to the 1955-59 turn signal switch. The plug of the wiring kit (910-64022) is a female housing plug with female connectors.
"Adding CFM to a truck will only help at engine speeds you don't want to use." "I found there was nothing to gain beyond 400 CFM."
