Here’s the kit I would use.
Complete all your home improvement errands efficiently and speedily with the help of this Interline Delta Repair Kit for Kitchen Faucets.
www.homedepot.com
You do not need the o rings, those are for two different era kitchen sink faucets. You don’t need those.
You would need to reinstall the adjustment cam ring into your cap assembly.. This ring doesn’t come in a kit, it’s sold separately.
Silicone grease is good to lubricate the rubber cam with
After its all back together snug the adjustment cam down.
Turn the water back on and open the faucetand make the stainless peg stick straight out and snug the adjustment ring down once more, but don’t over do it.
Reinstall the handle.
That adjustment rings applies pressure to the entire assembly inside the faucet. If it’s not adjusted properly the faucet could leak out of the spout and or under the handle around the stem.
Delta needs to leave things alone. It worked just fine with the original design. They developed the new part to save on assembly cost at the factory, it’s not superior design.
trust me.