Piston dome question?

A buddy and I found a 340 in a junkyard once( thats what they were called back then) that had been sitting there with no weather protection. He bought it for the heads and intake. It had at one time sat with water on top of the pistons. Well I got the short block for payment for doing the swaperoo onto his 318. I was 18 or 19, or maybe 20.
Well I had this blown up 318 laying around, and now this fugly pistoned 340. Well now, you can guess the rest. One bank of pistons had pits the size of half-BBs.I spent some hours on it (hey I was still living at home and unemployed) And put that teener top end on that junkyard 340, with nothing more than a set of 340 springs, and dont you know that conglomeration ran gangbusters.Well at least in my mind.I think I might still have that beast around here somewhere.
Just reminiscing. I wonder if you arent worrying a bit overly.If youre gonna run 10/10ths, Stuff gets real important. For street motors not so much.
My brother told me a good story. Seems he and some rascally buddies were out bush-partying this one time and got a bit crazy. They had this beater 74 Duster that body-wise was done. Well they fired it up and bricked the gas pedal wide open. After about a half hour of that( not my story) they got tired of the screaming teener.Well one brave young boy figured out how to get it shut off. Well of course it didnt run after that so they gave it to me. So now I had this yellow tank. what to do? Well I had this kinda business where I bought neighborhood beaters cheap, fixed them and resold them to all my brothers myriad of friends.So I dug into it. I found every single valve had kissed the pistons. Can you imagine? Out came a pair of heads from the stash, and a few hours later we had a fine running teener. And lots of eager buyers. Well I figured a road test was in order. Well the first set of tracks I crossed and the car was headed for the ditch. I managed to save it and nursed it home, where I immediately put it up on jackstands for an inspection.What I found was rotten frame rails and rusted off inner fender aprons. Since I had no welding experience (this was about 1980) nor friends who did, this body was scrap metal. I stripped out the good stuff and made the call. Im sure I still have that motor around here somewhere too. Or maybe I put it into this old Demon I once had. Yeah I think thats where it went.
There might be a point here somewhere. I think Mopars take all kinds of abuse and shrug it off.If they keep all their fluids in the right places, theyre like the Eveready Bunny. Sorry to clutter up your thread. May the Force be with you.