Very sad to read about Al Unser's passing. He was a great competitor and a very quiet unassuming guy. I remember listening to the radio broadcast of his 1971 Indy 500 win while my dad grilled meat for a community pot luck Memorial Day dinner. My best memory of my years as a mechanic in CART is Al stopping me in the garage area at IMS to congratulate me on my team's Indy 500 win. I'd never met him before but it was a very nice gesture on his part.
https://racer.com/2021/12/10/al-unser-1939-2021/
If you are ever in ALBQ, be sure to check out the Unser museum.
https://unserracingmuseum.com/
Memorial day 1983 is one I won't forget. I was holed up in a motel in Utah, on the way to the next Trans Am race on the schedule at Sears Point. Al Jr. did his best to keep Sneva from passing his dad for the lead, but was unsuccessful. I haven't checked the stats but I'm guessing there might be more than one 2nd place finish at IMS to go with Al's 4 wins.