Hello....the best choice for this application is the Holley 950HP in my opinion....

The 950 has the smaller 1.375 venturi that your gonna need to get this heavy car up and moving off the starting line....The Proform 850 & Proform 950 carbs both are larger on the venturi diameter at 1.400 & 1.450....and that is starting to hurt your bottom end responce as you go bigger then the 1.375....

whether you buy a Holley HP or have a custom carb built, you will be happy....

I attatched a link to our BIGS Stage 5 950 below....we have great pricing left over from the Holidays also.....Thanx allot, Jesse @ BIGS!!

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=200421128946&ssPageName=STRK:MESELX:IT