302 casting heads or P4452748 heads

Folks, I am looking for a set of good heads for a relative's 87 dodge 318 truck. It needs to keep all the low end power it has but it can use bit more mid and top. Love to find a good set of the limited P4452748 MOPAR Performance heads but a good set of 302 casting heads should work well too. Would you 318 experts agree?
So, do you have any of these heads or know where we might find them?
Thank you very much,
Tom Hand