Has Anyone Sorted Out the "LA" Cylinder Block Motor Mount Tab Variations?

dibbons said
The hole arrangement is what I am referring to.

My 273 and 318 on the passenger sides are exactly opposite one another (tabs meaning a spot with a hole to slide a bolt through):

my 273 had only one tab in front on passenger side while the 318 has two tabs in front (front meaning toward the fan).

the 273 has two tabs in rear on passenger side while the 318 has one tab rear (rear meaning toward bellhousing).
Click to expand...

Without having the whole array of blocks to look at, I can't tell you all the differences on which ones have how many holes... I think as long as you can get at least three good solid bolts on each ear to the motor mount, you will be ok...