DIY glass fibre plenum chamber? Bad idea?

[xxalexx at ix.netcom.com]

> Date:          Wed, 11 Feb 1998 07:56:13 -0600
> From:          Squash <mpc at genevaonline.com>
> To:            diy_efi at efi332.eng.ohio-state.edu
> Subject:       Re: DIY glass fibre plenum chamber? Bad idea?
> Reply-to:      diy_efi at efi332.eng.ohio-state.edu

> 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.
> -- 
> Andy Quaas
> 
Do these have backfire plugs?  I blew a vortec manifold to pieces, on 
propane.  dealer said plug should have popped first
Alex.