I was thinking of using the ls3/l92 heads I have with my magnacharger. Is there anyway to just buy the lower l92 intake for a mp122 magnacharger?

 

You would have to check with Magnuson, but I don't think they make a tub for l92's and the 122.

 

Callaway used the MP122's on their milder builds in '08 and '09. I was a little shocked that they would still use the older blowers instead of the TVS units. They may still use it today. When I asked about it, I got the "we're Callaway and we know what we're doing" thing. To answer the OP's question, I'm sure some lower mani's were made for the square port heads. Just don't know it they're readily avialable today.

 

If anything i bet WCCH could do some machining to make it work.

 

I have an lower intake blower and upper intake for sale. Just a thought.