Bob,
I've got a set of Stahl 1 5/8" that I got with my '81 Corvette stocker-currently running 1 3/4 Hookers that I was told were faster. I was planning on trying the Stahl's, but haven't. I talked to Jere about modifying them to step headers, but he said he'd rather build a new set-get in touch if you haven't found any yet.
Mike Vignochi
stsmikev@aol.com
850-509-1032