cant decide, old car vs. older car

ok i have a 1966 corvair that needs a bit of work to be road worthy. i have had it for a while and have done a bit of work on it, nothing really big like a new transmission or anything...yet.

i was recently given a 1985 mustang convertible. it is road worthy but just. now because I'm low on cash like most people now a days, i was thinking of selling one to work on the other. but i cant decide what to give up.

What should i do?

PS: Woo first post on this site!