you are right about the LSA heads, but the cathedral port gaskets were not even close and the shape of the manifold looks more retangular. The opening just aren't what I would have expected...excuse my art work, I'm holding my 5 week old in one arm and posting with the other lol!

 

See, these seem like they would fit the cut-out on the blower manifold.

 

That is the right manifold, Joe at Leftcoast recommends machining the ports all the way out to square if youre going to push the blower hard though.

 

I don't see getting more than 15psi into that high CR 408. I wouldn't consider that hard. I'm guessing 10-12psi. He runs like 22 pounds so I assume that's why he machined his blower.

 

Im not sure at what point he calls pushing it hard just a post I remember of his from one of the forums.

 

honestly, while its all apart, i dont see the harm in machining the manifold out to match the gaskets. do it now while you can, and hopefully will perform better once assembled. great build, by the way

 

Do the machining. Do it do it do it!!!

 

I'll have to make some calls first. I'm pretty sure that will mess with the Delta P that was engineered into the blower. Then I'd need to find someone who could do it, and fast. I'm ready to drive this sucker.

 

You've been concentrating on doing this right the first time. Don't get in a hurry now...

 

Id imagine magnacharger casts the manifold that way for a reason...