Worked over 440 motor home engine hp question?

chrysler used the 413 throu 1965 in cars. but used them throu early 70s with low CR pistons in big truck / motor homes. with , dish pistons. they will bolt into a car 413, 10 cr. the truck pistons changed it to 7.5 cr. bolt in, balance no change. but not cheap nor the rings. i am guessing they did same with the 440. may be