Originally Posted by CSP
There's no need to weld up the old holes. If you're only clocking it enough that the old holes would be in part of the new hole, you might as well just leave it alone.
If there's enough meat on the adapter to drill it, by all means, drill away. Not all adapters have enough meat though all the way around, or there may be other obstructions like support ribs where you want a hole.
I redrilled my Novak adapter. As CSP said mine had ribs on it that I had to miss. I clocked mine 6* as there was a rib in the way at 7*. It hangs about .75" below the frame rails now.
Do be aware that the holes are not on a bolt circle pattern (not evenly spaced)
83 CJ7, 350 TBI, TH350, Dana 300 twin stick, Dana 44 E-locker, Ford 8.8, Detroit, 4:10 gears, 35x13.5x15s
"Just Exchange Every Part"