i recently purchased a manifold to bolt a weber style sidedraft carb onto a 4port lower manifold. i didnt realize it was for a 4 port until after i bought it, (i wasnt reading everything). but i have a place that is willing to make a lower manifold that will fit on my motor (6 port) so the upper manifold (4 port) will bolt up, and clear the stock turbo.

what i need to know is, whats the difference in height on the stock 6 port and 4 port lower manifolds?

 

You can port a turbo LIM to match up to a 6 port block. I think theres a writeup on Nopistons.com

 

Send it back and get the correct manifold. Hacking up the manifold will result in inferior performance in comparison.

 

yani, i cant port the 4port lower manifold to fit my block, because i dont have one. plus i have seen someone here that posted pics of a turbo manifold and a na block and you actually have to add metal to the manifold and port it out.

and NZ, i bought it from a private seller so i cant send it back, and im not going to be hacking up a manifold, i am getting one built from scratch so the top one i have will fit,

and if i have some extra ones made, it will be a way for all the people with na motors to buy a turbo intake manifold and use the lower one im building and just bolt up everything up to their block. so basically, my mistake is going to be able to help people out.