Time to Inframe?

[JimT]

Well, I was gonna do a separate thread and keep this to general information, but doesn't seem to be much other interest here.

So, I just climbed over 570k miles.
My cm2250 burns about 1 gal every 3k. It was 2.5 gal every 10,000 mi prior to de-man, but it jumped to, and has held steady at, 1gal every 3k since March.
It's got blow-by, no question there.
Very little to no coolant lose unless the temps drop around or below freezing, then some random hose always decides to complain.

Well, finally made time to check my overhead and inspect the top end. 14 months and 80k miles since the local mechanic I used to use did it. Seems my gut feeling that I needed to check it myself was right. Here's what I found

#1
Intake was .035
Exhaust was .0365
Jake was about .273

#2
Intake was .032
Exhaust was .030
Jake was .275

#3
Intake was .030
Exhaust was .032
Jake was .271

#4 Intake was .028
Exhaust was .032
Jake was .270

#5
Intake was .032
Exhaust was .032
Jake was .271

#6
Intake was .022
Exhaust was .032
Jake was .270

All valves were then set to correct gaps. The consistency of those measurements makes me think the person who did it last year either used the wrong size feeler or something. The lock nuts were all over the place as far as torque, though none of them were loose.

Even with the valves off like that I was getting between 7.5 and 8.5 mpg depending on load (flatbed), location and conditions.

Everything else inside there looked good... EXCEPT one spot on the cam. #3 Intake lobe looked like it had debris (probably from my fuel pump) go between it and the roller. The surface is pretty damaged on the cam as well as the roller, which still spins normally. Pictures on my phone, will add them later. The rest of the cam looked perfect, barely even a scratch anywhere.

So, knowing what I know now, coupled with the fact that the fuel pump chewed up 2/3 of one of the ceramic plungers about a year and a half ago, I'm guessing that cam lobe has been like that for a while. How safe is it to keep driving this while I start sourcing parts? Would I be risking a large failure? Do I just replace the cam or do a full in-frame? I was hoping to make it to mid-September before doing an in-frame, but I don't want to push my luck any further.