Those stock heads normally measure out around 93 to 97.0 CC, take those numbers and plug in the normal motorhome piston deck height of -.100 to-.120 with a .017 thick head gasket with a bore size of around 4.440 and see what computes.
On your deal I would look at buying the cheaper Eddy 75.0 CC heads or maybe even some small combustion chamber Speedmaster heads scope
Plug the 75.0 CC into the formula versus the 80.0 CC of the Stealth heads and go from there scope

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)