I have an AFCO 26X20 (Summit part # AFC-80103NP) in my TF. The Flex-a-lite 180 fit like it was made for it. A bit on the pricey side, but a melted engine would be worse.
http://picasaweb.google.com/ChrisAurit/ItSChrisGreenTruck#5261399360526634818


[b]1957 Chevy Big Window 3100[.b]

In the Stovebolt Gallery
More pix in Picasa

It ain't broke 'til you can't fix it any more.