[Cal Metal]

If you are running the 427 FE, the correct transmission is a "big in", "big out". Those are 1 3/8" input/output with a 31 spline tail shaft. Originally, the close ratio was only available in the 427/428 ; however, David Kee does make a wide ratio "big in, big out". You also might want to ask him about the special white stripe Toploader Sebring Box which was a very rare transmission built by Ford for racing only. It was never available to the public as an RPO item.

The "small in, small out" (1 1/6") was available for all engines from the 200 cid six cylinder up to the 390 cid. Those could be ordered in either wide or close ratio from Ford.

Originally (I think) the 427 Cobras used the longer 27" Toploader but switched to the 24" inch at some point.

David Kee is the man to talk to if you are considering a Toploader. Best on the planet.