Lower intake is off... should I replace anything else?

Finally joining the forum!
Our Beast is a White 04 Limited V8 with 245K. She's NEVER had issues, oil changes, brakes and regular PM only for the past 15 years. Along comes COVID and boom she gets a rough idle.
1st - Sprayed starter fluid looking for vac leak, bingo, idle smoothed out
2nd - Smoked tested it and found a serious leak around the lower intake manifolds
3rd - Cleaned the top of the engine, blew of all the debris I could with my compressor and opened her up, confirmed brittle / cracked gaskets and placed the order.
Any common problems I should PM or are there any other parts I should replace while I have the intakes off?
Thanks for your input!