I was looking at this eBay auction for large tube runners:
http://cgi.ebay.com/ebaymotors/85-CORVETTE-SLP-TPI-HIGH-FLOW-INTAKE-RUNNERS_W0QQcmdZViewItemQQcategoryZ33553QQitemZ7995267604QQrdZ1
http://cgi.ebay.com/ebaymotors/85-CORVETTE-SLP-TPI-HIGH-FLOW-INTAKE-RUNNERS_W0QQcmdZViewItemQQcategoryZ33553QQitemZ7995267604QQrdZ1