I have 2 pairs of BBO B heads cores for sale. These are bare castings and have a little surface rust, but would clean up for use again. They came off 425's but will fit on any 400, 425, or 455. The late 400's and 455's will need slight work on the push rod holes to work on the 39 degree blocks.

These are supposed to flow about as good as C heads.

$75 obo plus the ride...or come get 'em. I can ship as economically as possible through Fedex Home Delivery. I've shipped a bunch of heads in the past, so I know how to get them there in good shape.

 

That seems like a good deal. Good luck selling them. Too bad I already have freshly built Cs on my engine and an extra set of Js sitting around.