Here is one also.
http://cgi.ebay.com/ebaymotors/SPA-Turbo...emZ320164001492They are $120 if you can get them from Brazil.Guys,,,,chime in here on what year truck manifold has the larger exit.
If you have everything set-up nicely & run sticky tires on a daily driver & does not weight too much, 11's can be achieved.
No write up on my car,it's a work in progress,a slow progress ;-)
MBHD