In discussions of the designer and manufacturer of my new engine management system, John Meaney, he mentioned he has an air/fuel device, using a UEGO that sells for somewhere around $600. While I am not interested, you may be. The company is BIG Stuff in Hartland Mi. phone 248 8870344 or email firstname.lastname@example.org
I have no vested interest in this product. John's background though is designer and owner or DFI, which has become ACCEL, Designer of the Fel Pro "Fast" system, and others. He is on his own now and doing well.