No hard feelings for the Chevy/Ford camps, OK? Just like to poke a little fun, I'm just jealous of cheap Chevy parts compared to my pricey Ford and Olds crap :~)
Anyways, I agree with RickWI. He knows what he is talking about, and both the CJ and Blue thunder heads flow awesome as well as dumping some serious weight. You need almost all the head you can get with 532 cubes.
RickWI, I see you are located in Madison, WI, same as myself. I'll be heading to the GLD this spring to wring out my '78 Mont and '72 442. If ya ever want to chat engines or catch a couple beers just toss me an email at firstname.lastname@example.org
and I'll get your contact info.