Solid is good.
If it were me, and you're seriously looking at getting a new truck rather than repair the one you have, I'd get the more solid one, and then swap all the parts over from your driver, put the other bits on the driver and sell it.
I know you said you can't park two trucks, but these things are EASY to work on, and if you get a couple buddies, you should be able to swap everything in a weekend.
I wouldn't worry about the 283... swap in any V8--it's dead simple. And a later V8 is cheap. Heck, the low-horse crate engines can't be beat. I've got one in my '62, and have over 20,000 trouble-free miles on it in two years. Leaving the 283 in your current truck will keep the value of it up when you sell, and then you can get a new V8 and swap it for the 6 in the new truck.
-Brad
Last edited by Brad54; 06/06/2010 7:46 PM.