Cam lobe going flat...what now?

I’ve had a lifter tick ever since my engine was new. I did all sorts of adjusting and never could get it to go away. I finally bought a second set of Comp lifters and replaced them. I used Camshaft Lube, Break in additive, and assembly lube all from Comp. I fired the engine and ran it between 2000-2500 RPM for 30 minutes as per break in instructions. It sounded great when I let it idle following break in. Finally no tick. I then removed the valve covers to replace the inner springs and everything looked good and tight.
The following morning, I let it warm up and took it on a short drive. A few miles out I started to hear a rattle so I turned around. By the time I got home the rattle had turned into more of a knock. Tore it apart to find what felt like .050” lash in my No 6 Exhaust rocker.
With the headache I’ve had with hyd flat lifters I think I am planning on making the change to a solid roller cam. I don’t mind the noise or the additional maintenance. I have two questions;
1. Given my combo, What recommendations do you all have for a cam for my setup? I had a .545 lift cam and I’m not sure if I can handle any additional lift.
2. What kind of clean-up is required prior to stabbing a new cam in? The Marine Corps has me TAD to Florida for 6 months away from my garage and many of my tools so I’m really hoping to get by without pulling the engine. I’m hoping I caught the problem early enough to prevent further damage. If the cam bearings aren’t damaged can I assume the main and rod bearings are good?


My setup is as follows;
Rebuilt 440 with 1300 miles on it.
70' forged crank and reconditioned rods
KB 237 forged pistons
10.6 compression and running on 93 octane
Stealth Heads w/ adjustable 1.6 rockers
Comp 924-16 springs
Eddy RPM dual plane intake
Atomic EFI system
MSD 6AL2 ignition
1 7/8" fenderwell headers into 3" exhaust.
3.55 rear 8 ¾
4 speed A833