I've seen a couple where someone started with 2 globeliner cabs did a front half/back half to get the stretch and 2 level roof to keep building out from there.
These might help if you start running low on motivation, since it sounds like fabricating isn't an issue.
http://www.scale4x4rc.org/forums/showthread.php?t=82630
http://www.scale4x4rc.org/forums/showthread.php?t=44524
http://www.scale4x4rc.org/forums/showthread.php?t=18816
My 1962 ALF 900 is already a steel body, i'm still needing to grab a semi truck and 'do magic', then i can try to go crazy with detailing.
The annual muster sounds awesome, i'd like to see some of those pics too.