Here you go, straight from Ma Mopar. This part number decodes to the 73+ B/E body guide pin package. It clearly says the pins can be used on the earlier cars, as long as you use the supplied later bushings and use them with the later brake packages.
View attachment 1716308843
It says
"INSTALLATION INSTRUCTIONS
FRONT WHEEL DISC BRAKE CALIPER GUIDE PIN
PACKAGE NO. 3744 477
When using the enclosed caliper guide pins on 1972 and prior model vehicles the new double flange (spool type) inner bushings (also included) must be used in place of the single flange inner bushings previously used. New slotted type shoe and lining assemblies must also be used when using this caliper guide pin package. The bailwire anti rattle springs, caliper guide pin positioners, and single flange inner bushings are no longer required when using this package and may be discarded"
More than likely the brake pads now work with either style if it was ever an issue to begin with. Kind of like how the "70-72" guide pins that are available now have larger heads on them than the actual '70-72 guide pins. And of course different sources list different year ranges for those guide pins.
If you're really hung up on it, the above picture is from an active eBay listing for the caliper pins so you can buy that set if you'd like. I enhanced the picture a bit so the text was easier to read, but the seller has a complete set of 4.
NOS Mopar 1970-78 B+E-Body Caliper Pins | eBay
Regardless, the thread size/pitch is the same on all of them