Just on the of chance you can score a 302 intake cheap, like an efi Performer, here's something you might be interested in:
http://www.pricemotorsport.com/
Also, the Explorer 302 intake flows better than
the GT, about equal to the Cobra, and can be
had cheap at the right junkyard and could be
used with those adapters.
Here's some info:
http://www.geocities.com/MotorCity/F.../Explorer.html
http://www.stormpages.com/saleen90181/explorer.htm
http://www.edelbrock.com/automotive/..._overload.html
I'm looking at the same situation on a limited budget. focusing on highest possible mid-range torque for hiway rpm in a heavy vehicle