Having recently restored my 71, I can give you the following recommendations in terms of exterior items
1-if you are going to pull the tach, cluster and speedometer, send them out for service. Now is the time.
2-replace all bulbs now
3-all rubber seals that touch glass should be OEM. The truck should also be OEM. I have also used OEM door seals because I heard there were issues with these too, but some people have used aftermarket.
4-if anything needs to be re chromed---do it now.
5-replace windshield? (also plenty of advice as to the sequence of steps to do this here on our site)
Are you doing engine work? How is your exhaust?--I have plenty of advise as it relates to other things as well.
Steven