Building a 540 blower motor, looking for some good aluminum or iron aftermarket heads. What you got?

We may have a spare set ported Dart IE heads. Have you already bought your pistons? These custom ported 323 cc heads have a 105cc chamber and you would have to order your pistons to allow you get your targeted CR.

How much? My comp is 8.3:1 with a 118cc

I doubt you can make these heads work with your current set up. You can confirm with your engine builder.

Are talking in good shape or make good power? I think JimV (Valako) has a new set of his aluminum Dart cast heads at his shop. PM him.