OK now I am really confused.
The block from this engine has a # 950 on the manifold side.
It does not have front motor mounts like my 235.
It has 2 1" diameter holes at the top of the front side for the water pump.
It is a 3 3/4 bore x 3 15/16 stroke
I will take pics once I clean the block.
Anyone have an idea what this 261 came from?