I have 2 cars- 1991 Tempo and a 1988 MX-6 GT. Performance work on the Tempo?

It's a TEMPO!
I may need to replace my CV joints/axles/boot/other mysterious things eventually as well.
If I were to get to the point of needing to replace the seals and gaskets, I'd be asking for someone to basically DO the work for me. And then when they're done I'm gonna look at it and think "I coulda done that."
My oil and stuff came in today. Probably Monday I'll get to work doing the oil and filters, but I'll need at least 1 other person to help with the transmission fluid in the Tempo (automatic).
"If its worth doing performance work too..why not do it?"
I probably would, if I could. Mainly my concern is replacing worn parts.