Top one was made by Mallory, and while some people like the adjustability, its geometry isn't well thought out.
The others are chrysler made. On the governer, the part with the slots for the weights, the max advance is stamped.
Just take a note of what is there and if the slots are in line, or slightly angled.
Not knowing how much initial the engine will work best with, its sortof a crapshoot as to which governer to use. Nothing over 13 if that's a choice. Most secondary springs on the on the early 70s cars will have a very long loop. I'd start with the shortest overall length if there's a choice. Those were for engine with initial timing around 0 or 5* BTC. You want to have at least 10 or 12 initial.
Same with the primary spring. Make sure whichever one you choose, there is some tension on it when installed with the governer. Don't want the timing to advance below idle rpm. You may be able to add some tension with the eccentric. Photos of that in the linked thread.
