Dougie, you can make the required adapter with some simple hand tools and a cheap Map gas torch. This post gives some fairly detailed instructions. Make the sleeve used to fill the gap between the adapter and the header pipe about half as long as the one shown in the post (about 1 to 1.25" long).
http://suzukisavage.com/cgi-bin/YaBB.pl?num=1623048749VHT Flame Proof paint (black or silver) dolls it up nicely, and these Evil Energy clamps work good.
Good luck, Mike