I talked to Jay allen at CI about them last night. They are Canfeilds.

Hard to get right on a SB, unless you start with bare castings and go from there. Natrurally he recommended the CNC versions. I have seen a couple of 347's run them and dyno at 430's to 475 hp.

I am likely getting one of the Boss shortblock kits this week and am looking at heads to top it with. The Novi 2000 will be going back on this combo also, so I dont need to crazy of a head.

This setup should make some big steam!