Opinions on heads please?

i went and grabed the magnum heads from the yard today $50. if you can use a roller cam you can use the lifters, and pushrods. you can use the la valve covers to make it look stock and drill and tap the intake it to the la. They made 400hp with a 318 with no porting a 500 lift cam and 10:1. ported they flow 270 or so. which is plenty for 500hp and up.

steve