All 58-62 blocks have the 3 bolt side mount, and most also have the angled 2 bolt front corner mounts that were used on the 55-57 cars and 55-62? trucks.
My '60 261 and '58 235 have both sets...
55-57 blocks only have the front corner 2 bolt mounts.
'54 blocks have the '52-54 car type 3-bolt sidemounts (different than 58-62).
Tom Langdon has mounts available to put the '58-62 engines into the '52-54 cars, using the stock '52-54 frame mounts.
I don't know what Buffalo sells because he doesn't think that an accessible catalog or website is important, so you would have to call him...
I am working on motor mounts to cover all of the variables, but I won't be ready to sell them till later this summer, after I finish up on all of the alt/AC/PS brackets I've been developing...
