that piece isn't as long as the part manufactured in the linked thread
that piece is designed to be used with the top plate from the early soarer transmission, which uses a swan necked gearshift, while the linked thread shows a nearly straight gear shift
When i did a series of short shifter group buy/exchange on another forum i had the chance to look at w58 through to jza70 and jzz30 shifters, its a subtle difference, most people just bend them to suit.