Thanks guys,,
THE FRENCHTOWN FLYER,
This is for my 12 port cylinder head (Chevy 250).
I need to make my own intake manifold & turbo exhaust manifold.
Hogan (Hogans manifolds) made one for a customer of Sissels & there is a pic in there catalog,IIRC It was $2500 for the intake manifold.
Too much for me. :-)

Douglas,
my intake ports are not as big as yours,1.71"
I still need to figure the size plenum volume I need.
I will PM you.

MBHD


12 port SDS EFI