After a little research.
Not trying to offend you, but a clean part is a clean part. The cam and bearings would be new in a short block. You would have the same chance of failure with new heads as you would with cleaned old heads.
No offence taken in any way. I honestly(and many others) prefer these forums over other platforms for straight forward discussions. I think we all have similar mind sets and are Land Cruiser enthusiast . I am by no means an expert on Toyota engines. Having rebuilt an S85 M5 motor from the ground up after a rod bearing failure, my main concern was always the metal in the oil and what it affected.
The issue is with the oil passages and short of stripping every single part off the engine and pressurizing the stripped block's oil passages to flush out any contaminates (thus eliminating the chance of reintroducing particulates), there's no other way that I know of to clean the block. That would be so labor intensive and not cost effective, much cheaper to use a short block. Cleaning the heads.......... the oil flows through the internal passage in the push rods which are easily cleaned/replaced which is cost effective. Any mechanic would inspect the valve train surfaces and determine if there was enough wear to warrant replacement etc.......
The cam wouldn’t be new in a T24A short block. These engines are overhead cam. The other disadvantage of a short block replacement would be trying to get a technician that knows how to piece an engine together.
I stand corrected, I knew it was an overhead cam, but old habits are hard to forget......LOL
