I have a relative that is also a truck driver. can't imagine gas prices are fun for you folks right now! Can't imagine how you have time to build guitars.
i know you aren't asking but... you might consider the ruby amp over at runoff groove. it's easy to build, very small... you can get a couple of 2" speakers for less than $10 over at taydaelec... less pieces to put in the truck anyway and would be interesting to see it all fit in there.
anywho, rawk on.