Not many, if any, are AL and I don't know what Cl is.
Ken, Ed was referring to what the bolts screw into - AL = Aluminum of course, and CI = Cast Iron.
Very detailed writeup on your part, and good recommendations. It's been said that if you have a Chevy, you only need a 1/2 -9/16 wrench. That's pretty close.
Merry Christmas to you as well.
