I found a sweet *** deal on an RB maifold for a holley 4 barrel. I'm currently building one for my S4 block but this is a bad *** deal if I could use it. Is if possible to mate the FB manifold to my FC block? I mean, as I've read here on the forum, a god deal is great if it's put to use, otherwise it's just **** in the garage...

 

Is the RB manifold for a 12A, a 4 port 13B or a 6-port 13B?

 

Is the RB manifold for a 12A, a 4 port 13B or a 6-port 13B....?

 

The RB is for a 12A, I want to put it on an S4 (4 port) block.