Jerry, Thank you. My ignorance was showing....again.
I saved the e-mail to my pc so I will not loose this info. My 90 I/H's are still on the car. I have the 91 I/H's in my shop, but have not looked at them in a while.
I guess my next Q is did they leave the 3rd hole in the head open on a 90 block? Or do I have to do some drilling? I am going to go look in the FSM, again.....I did when I unpacked the 91 stuff two yrs ago, and my heart sank when I discovered that all I/H's are not the same. I just don't seem to remember the FSM being of much help in this department.
Again, I thank you for sharing the light!

Tom
Jeff, I got shipping confirmation late yesterday from Rock Auto. Should be by the end of this week or early next week on delivery.