I'm with David here - for $400 I'd keep them, providing the portwork already carried out is just a very basic portjob. You did mention that was the case, so it should be fine. You can usually tell pretty easily if someone has "overported" a set of heads to the point that the flow numbers are often WORSE than a standard set.....
Ally heads do look good in any engine bay... Congrats on your purchase !
