I got 35/36. The only one that foxed me was the 348-409 poser (the difference being the dipstick location). I think that was the only question in which two of the multiple choice answers were the same basic engine block.
The photos of the Studebaker and Mercury 383-430 engines were a little tricky to identify, since these engines are a little obscure, but it was easy enough to deduce them by elimination.
Here's a followup questionnaire:
Which of these basic engine designs (i.e. from the quiz) (not necessarily exact displacement, model year or model) have you owned and/or worked on?
My answer:
Late Buick big block (400-430-455)
Early Olds (303-324-371-394)
Mopar big block
Mopar small block
Chevy smallblock (yes, really!)
late Olds (260-307-330-350-400-403-425-455)