Okay, found this... I know, search...I was under the impression that there was only one shaft that went from the front of the engine to the back, but I see that that is not the case and the shafts are separate and each go in from the valley side, ie laterally.
http://www.zr1.net/forum/showthread....hrottle+shafts
There is a product , jb weld might be the maker, that is like putty.. I believe it's two part, but it may not be. I have used it to seal leaky freeze plugs and it hardens like a rock in about 5 to 10 minutes. Can one just fill the holes with this putty? I see the plug that is recommended but is that overkill, or would I just be turning a good job into a hack.