Suggestions for new design Aluminum Mopar SB clean slate (kind of) cylinder heads

@Johnny Mac

Best of luck in this endeavor. Creating a “Tweener” head while using standard bolt holes for off the shelf intakes and exhaust is not going to be easy.

I think lessons learned and read about on other heads are your guide line. Some lack the ability to accept larger valves, lack of metal for porting, thin decks that have the valve seats cracking and chamber design are on the fore front of complaint issues.

The pipe dream here is a worthy W5 replacement. That was a (old) worthy cylinder head design of the time with very poor execution. Not MoPar’s fault really. The castings stink and the metal itself is horrible. A poor grade or aluminum.

The W series ports should not be copied for street use. A better route IMO is a ported Trick Flow head port and used as a as cast port for the BP head with the ability to further port the heads.

I’d like to see the above in about a 210/220 cc intake runner head.

I don’t know if this is possible. I see the Chevrolet heads can be obtained like this and don’t know why a MoPar head can not be.

But that’s my take on the “Tweener” head since Edelbrock and Speedmaster have good street heads that can be well ported and then the race Victor which is pretty bad *** OOTB.

I’m not sure this fits your search, but thanks for taking the time to read my reply and asking the forum on this topic.

Rob

PS, enough metal on the sides of both intake and exhaust ports to move the attaching holes for larger headers and W series/custom intakes would be huge for me personally. The ability to raise the roof and not have a weak spring area at the roof is a big issue on most heads. There is so much to be gained by n the roof but limited by a thin roof under the spring seat.