I have a couple takes on this...
Does your wife have a vehicle, if so, what is it?
I've been strapped for cash before, but a truck for $2700 is pretty darn cheap. Unless your having some pretty severe financial troubles and have horrible credit, take a loan out for the newer truck (and a little extra to fix the longhorn
) and payments should be a couple hundred a month for 2 years? Be something to look into and you can keep both trucks
If the above is the issue, family comes first, sell the longhorn. Also remember though, a 91 chevy, while a good truck, will most likely eventuelly have problems too.