jfnar...Your '66 GMC tractor maybe good trading material (or an outright sale) which can give you the $$ for a more reasonable type of repower unit for your '57. There isn't a big demand for these heavy trucks but its worth a try. Try a post in the Stovebolt For Sale Forum, with lots of pics on webshots or something similar, and let us see what you've got.

Mike.... Would love to see some pics of that early 60s GMC tandem tractor you've mentioned, that's a rare truck indeed! And its still in operation??

James

1957 Chevrolet 6400 flatbed dump
In the Gallery
Webshot pix
1942 Chevrolet 1 1/2 ton
1962 Chevrolet M80 tractor