Just get the Esslinger head.

Dave would be a good person to talk to. Michael was also telling me there is a guy up in Spring Hill or somewhere around there who specializes in building 2.3's for sand rails. May be a good shop to look into.

I know Scott will chime in with the contact info for the infamous Brandon. He was willing to fiddle with my Zetec head back in the day, so I imagine he will work on practically anything.