170 & 225 head swap?

I dint think setting the valves would be so much of a problem either TBH, I have been told it was in the service manual when these cars were bought so it cant be that difficult but here I am asking questions with few replies.

Im more concerned about bolting the rocker arm shaft on from one engine to another and hurting a valve or push rod as the rocker arm is set for another engine. No one seems to know though.