1972 b300 van advice

Hello!
I recently purchased a B300 van that was hardly used. 66000 original miles. It hasten been ran for since 1999 but it made it survived a 3 hour drive. I need to change the fuel pump and and have been advised to replace the uline barring.

Is there anything else I can change/replace
/upkeep to make sure the van is running in top condition? Thank you!!!

My last van was a 1974 dodge tradesmen 200 with a 318 engine so I'm a little familiar.
Author: Ryngus