Chevy has the stroker kit for the 350 to 383. Oldsmobile does not have that option yet for the small block. However, their is a kit for the big block where you can obtain almost 500 cubic inches. Check out Mondello's, Dick Miller, or FCR for this set up. You could visit Year One:
http://www.yearone.com/serverfiles/f...ain2.asp?cat=3