There is just about no performance parts for the poly 318 or any other engines in that family. The 361 is part of the big block family of engines which will include 383, 400, 413, 426, and 440 engines. The 426 Hemi engine also uses the lower end of these engines. And the distributors are mounted at the front of the engine.

The early big blocks came with a variety of intake manifolds. These are 2X4, Short Ram, Long Ram (used mostly on 413's), and even an extremely rare EFI system.

The small block 318 came out in 1967. All 318's from 1966 and earlier are the poly 318's.