Searching for some information on a Muncie setup that I am planning to sell and came across this post. I can help you with the rod numbers at least for 65 Impala L74 300HP.
Mounting Plate - 4205
1-2 Rod - 3646
2-3 Rod - 3647
Reverse Rod - 3641
I am still trying to verify that the shifter and handle are also original.
Any help with the Shifter number 3910012A and handle number 2746. It is a welded setup so I know its early.