I have Hooker Comp series headers on mine, fit great, although mine is 2wd. Nice 5/16" thick flanges, haven't had a leak yet.
One plug is tricky(#5)to get a wire onto, even using 45*boots.


My \'64\'s in the Gallery
Pictures in my Photobucket
1964 C10 Custom Cab 350/700R4
1964 Suburban 350/700R4
1979 Ford F350 4x4 400/c6