Neutral Safety Switch swap?

Hello Folks, I have a 68 727 for my 383 Scamp swap. Naturally, being a 1975 Scamp, it has the three prong switch plug. I've read opinions about just using a three prong NSS on the 68 Trans and plug into the Scamp's harness and all's well.

But, Isn't the "Rooster comb" different as well as the valve body 1968 and back, and 1969 and forward?

What do you guys know? Thanks!