The Duggan-Sissell head has been around for years, call Sissell's Automotive (see ad on back page of The 12 Port News). Ph. 626 331-2727 or go to www.sissellsautomotive email sissells@aol.com

Also check out The Chevrolet INline SIX-Cyliner Power manual by Leo Slantucci for more ideas on 250 heads.

Jim, I.I. #173
(It's easier to get forgiveness than permission!)