Yep forgot it’s still attached to the gear box. It’s always hard discussion as to how far you go . I have finished rebuilding my 3A engine and found that the Cam timing was out by a tooth and a half from standard, which was apparently common. I pulled the oil gallery plugs and the was quite a bit of debris. The oil pressure was fine before the strip but the big end bearings were down to copper. Fitting a new timing chain and a vernier timing gear will help considerably but what ever you do don’t buy a cheap timing chain. I rebuilt a customers engine with a cheap Moss chain and had to replace it due to noise, fitted a Heavy duty one, no issues . Pulling the filter head and cleaning is a good idea. I would still undo a big end bearing cap and check the shells, as they can be changed with the engine in the car, the oil complete with metal from the cam world have been circulating through the bearings for some time. If you can get someone to operate the clutch while you are underneath, check for crank movement. If considerable you need to replace the thrust washers which can be done with the engine in placeWell...you can change the cam bearings, but you will have to open the rear plug, so the tranny must be removed to do it for the rear bearing. That said, you should not have to change the cam bearings because of the bad lobes. The bearings receive clean, pressurized oil from the oil filter, so they should not be contaminated...and if they are contaminated, then all your rod and crank bearings will also be contaminated. Honing of the cam bearings will introduce grit and metal into the oil gallery, so I would not recommend that either, unless you plan to clean out the entire engine oil system.
I short, unless the cam bearings are notably bad, I'd run them Opps as is. They do not wear very fast, and even if they are worn, they were not the cause of the lobe problem.