you can get bigger cam bearings - I just finished my 2f rebuild 3 weeks ago - took a few attempts - some deets on my thread (was my first engine build - some things were 'effed by me, some not - oh well)
JimC posted what to do with the Head for chevy valves
2F head rebuild threads - https://forum.ih8mud.com/threads/2f-head-rebuild-threads.1034249/page-2#post-13196651 (Here is his post to save some searching )
That head is for domed pistons - secure new ones if going that way - I got the performance dome pistons from JimC - not quite last resort, but pretty close. Glad I have them too. I can accelerate going uphill. I had a place for 40 over domed - they found some in the Land Down Under - shipping was over a month - row boat I guess. I got impatient canceled and bought the performance one. Manafre I think sells the performance too or Red Line - can't remember off had.
There are threads about using Delta Cam to do a performance grind to cam - I seriously though about it - still not sure I did the right thing not sending it to them. (was looking a the grind for more air at higher rpm = highway speed vs torque with stock. It was about a 4 day turnaround - I can't remember the quote they sent exactly - but a couple $Benjamins was all.
here is a link to confuse you - there are others if you search delta cam
KC850-250s cam shaft grind from Delta - https://forum.ih8mud.com/threads/kc850-250s-cam-shaft-grind-from-delta.366773/
I can't remember which set of bearing came from where (cam, rod, main) -
cam bearing were OEM that I got - here is a listing of the OEM size available. (I fuc$&d one main bearing on install - it didn't spin and ruin the engine, I caught is while testing - but jacked the cam and crank - about what your cam looks like - maybe they can polish it, hard to tell from just picts)
Camshaft & valve for Toyota Land Cruiser FJ40L - Genuine parts - https://toyota-usa.epc-data.com/land_cruiser/fj40l/3685/engine/1302/11802/
some came from Dubui from partsouq.com
Anyway - if you have questions, maybe I can answer having just completed it.