I have found a company that will custom make the lines to be longer for the LS1 brake upgrade:
here is a link to an old auction on ebay as an example:
98-03 PONTIAC GRAND PRIX Stainless SS Brake Lines F+R - (eBay.ca item 160202712013 end time 05-Feb-08 00:58:18 EST)
here is a copy of his reply to my question if they are able to make them longer:
Dear customer,
Thank you for your e-mail. Please be informed that we are able to make the front lines 4.5 inchs longer than the OEM’s. However, the only thing that we need you to do is to add this request once again in your Paypal payment otherwise we will send you the lines as long as the OEM’s.
Besides, please also specify the year, make, model and sub-model in the payment.
Please don't hesitate to contact us if you have any questions. Thank you for choosing A.P.D. and have a nice day!
Best Regards,
Sales Team
Autobahn Performance Development
1-866-248-2861
sales@autobahnpd.com
*Built to Perform*
I have not inquired on a group buy...but I just thought this was very good news. as they are WAY less cost than ZZP.
I am waiting for mine to arrive.