I think its a good idea just because of how easy it is, it took me maybe 15 minutes and helped my peace of mind greatly

I dont know if they would be like that on most KA's or not, I didn't think to check my first motor to see how it was, but this one was in very good condition, no noticeable wear, no oil buildup, just some slight varnishing in the valvetrain. Despite that, it still had gummed up sprayers.