I have a 25" Tempo frame that needs a fork. Did these originally have a low or high trail fork? Anyone know a measurement? Most of the large frames I have have a 2 1/4 or about a 57mm fork rake.

Depending on the year, these were 3rd from the top behind the Paramount and Circuit. They were mid to late 80s frames that were designed for riding in a criterium. At this point, you should have guessed it: low rake.

This is a random image I pulled off the interwebs:

I've got one right here that will do the trick. Bottom end exactly matches my 23" Tempo and the steerer is 210mm, 80 of which is threaded. Easily works for a 25" Tempo frame. Not a Schwinn fork, but it's 4130 Cro-mo and made in Taiwan. It's a slope top crown, it's chrome, it has a single lower braze on for fenders like the original fork, and it's in really nice condition.

Probably 45 mm rake? Similar to carbon aftermarket forks?

I have several forks, but I am interested. How much rake?