They could be into the water, I have seen them both ways. It all depends on the casting and how deep the threaded holes go. Its not a big deal ether way, just use a little sealer on the threads. Vise grips work well on getting the old pins out.
Pay close attention to the thickness of the flanges of both header and manifold. The small bridges that hold them in place may need to altered a bit if one is way thicker then the other.
Use plenty of sealer and don't let the header just hang when you tighten the bolts. Try to hold it out away from the block so the flange is flat against the head. It will take about four hands to hold everything inline so it seals first time. Joe
Last edited by Joe H; 01/27/2008 4:40 PM.
