Ok so I've got a 1966 Toro and I've been working off the assumption that it had a 1966 425 in it. I'm starting to get a bit suspicious after finding certain things just aren't matching up with the shop manual. Ive got pics of every number and letter I could find on the block. Ill post pics and numbers, any ideas guys? Thanks in advance for the help!

Ryan

All photos here:

http://s1177.photobucket.com/albums/x354/cptsoban/

 

C heads = 1967-69
396021F = 455

 

Wow strange, a warranty engine replacement maybe? I'm wondering why it was changed out so soon, thanks!