I have a set of 289 heads casting number C6AE and I was wondering if there would be any benefit to using these heads instead of my stock 1990 Mustang 5.0 heads. If I had a choice between rebuilding and using either set which would yield the most power? Response? Torque? I'm just wondering because these heads were given to me and if they aren't worth using I want to get rid of them. Thanks in advance,
-Erik