a 480 hemi with that cam will be pretty smooth, very strong through t he RPM just not a real high RPM. If I was in his boat I would build what I have but run at least 10.5 compression since you got a hemi that is detonation resistant as well as the big bore allows you to get a little bit of quench. Something as complex as a gen II hemi you don't need to throw in more variables like stroking it when it is not needed. It is not like what he has is very valuable so he can not sell it to finance a stroker anyhow.