And the explanation of the difference I got online:
Quote:
The top four holes [of the 61-earlier] will line up but the bottom two holes on either side of the block, along with the dowel locating pins are different than the 62-66 Poly 318 engines and all LA engines.
Third, the starter location on all the aforementioned Poly engines is different, positioned approx.between four and five o' clock vs. the 62-66 Poly 318 engines and all LA engines. The 62-66 Poly 318 enignes and all LA engines starter location is closer to the block; approx. the five o' clock postion.
