Ok so I bought a griffin aluminum rad. The inlet and outlet holes were staggered instead of on the same side, so I had to take off the brand new water pump I just installed and install one for a 1970 (mines '66) so that the outlet hole is driver side. I go to O'reilley's and buy one, go to install it. The holes and everything line up but on the block there is like this little nipple thing that sticks out about 1 1/4 inches that gets in the way. It is about 3 inches to the left of where the fuel pump goes. This is really annoying. What do I do now? What is that nipple thing?