Intake Manifold Modification
In the quest for good air flow on the intake, but still have the stock height to enable the factory air cleaner to be used, I had to sacrifice an original 1971 455 HO aluminum intake manifold to achieve my goal.
The surgery was performed by 
and here's what was involved.
Top before and after
Bottom before and after
Intake ports before and after
Port match to the SD modified Edelbrock 72cc heads with
high ports
Intake runners before and after - the CNC work goes right
to the plenum
Intake flange & plenum modifications
