DIY glass fibre plenum chamber? Bad idea?

[DemonTSi at aol.com]

In a message dated 98-02-11 09:26:08 EST, you write:

<< The company i work for makes plastic intake manifolds...Very lucrative. 
 We are working on a lot of them for the new fords in particular.  I
 don't recall what type of plastic it is, but i can check if you want me
 to.  These are injection molded. >>

Are you sure that they're injection molded...? I had always thought that
injection molding was better suited for non-hollow parts. I would think that
they'd be blow molded. But either way, plastic intake manifolds are cool.
Could you please find out the type of plastic used? It seems as if more and
more manufacturers are turning towards plastic intake manifolds...so there's
definitely a future in them.

Van