Max Wedge heads

There are only a very few guys that can use them and you are limited to only 4-bolt valve cover if you plan to use them.

New Trick Flows would be a much better option in my opinion over these for the average guy.

Tom
518 are 1964 Heads and all have 6 bolt.

286 are 1963/1962 heads and all have 4 bolt.

That is how my elder mind recall them.