Quote Originally Posted by flanker1970 View Post
Going back to the canister filter as the spin on adapters suck. ( they always leak). Is there supposed to be an adapter inside where the canister bolts onto the block? Guys have told me that all there is, is a canister, filter, large bolt, and gasket. No bypass adapter. The eng is a 1966 283. Thanks for any help.
My 283 took a spin on filter, the filter boss was right on the block with a threaded nipple in the middle - IIRC

Found this article, hope it helps