Big Block OR Small Block 727????

My call would be a small block.

Look at the holes below in red.

If the distance from the front of the square to the front of the hole is close to 6", it is a small block,


If the distance is less than 6", then it is a big block trans.


I couldn't find the number in the listing, but it seems to be of the 74 - 75 vintage, mostly the '74...