How to make exhaust headers from solder

This is a link for a how-to on making exhaust headers from soldering wire/heat shrink tubing:
http://modeltech.tripod.com/sldrhdrs.htm

I'll post some progress pics when I begin making this header for a Datsun 240Z
http://files.automotiveforums.com/gallery/watermark.php?file=/503/133284m028.jpg