Wow, sounds like you are a few weeks behind me on the exact same scenarios. Same bike, same year.
Failure in the cam chest took out the motor and a new long block is being installed as we speak.
I went round and round on cams. Spoke to manufacturers, my tuner and read every post on several HD forums.
My configuration is also similar to yours with slip-ons (RCX4.5) that are, according to the experts, too large.
Trying to be clever I wanted a cam that would help now and still be usable down the road if I do the 117 kit or heads (or both).
In the end, I deciding three things:
1) I would replace the RCX's with Fullsac 2.0' which is done
2) I would select a cam that give me the best performance for my bike and riding style, given the CURRENT heads, pistons, displacement, compression, etc. I will exchange that cam down the road if I do any further upgrades that require a different cam.
3) I would replace the stock lifters with S&S premiums and toss the stock lifters.
So what cam did I select?
TTS100 and TTS150 were the two I finally narrowed my choices, but ultimately I went with the TTS100 for that low end torque. I rarely run the engine 5000 or more, so the extended top end wasn't as important to me as getting my 1000lbs machine moving.
I will pick up "Lucille" on Tuesday and report to the forum my initial opinions on how I like this cam. The following week I'm scheduled to bring her to my tuner, who will do his magic. I'll report again on how she rides after that work is complete.
BTW, cam selection was a hard one for me because I didn't realize how all the components have to match. Once I grasped that concept, it became an easier decision. Good luck with your choice.
P.S. You might check my similar thread:
https://www.cvoharley.com/smf/index.php?topic=115637.0I will be posting my results there.