What do these air injection pump ports look like? Any way to adapt them to the magnum heads via machine work? Strictly academic now, as I think we're off topic from what the OP originally asked!

The magnum heads can be drilled/tapped to use the original spread bore, EGR intake. Either do it yourself or Hughes advertises it for around $75 plus shipping. Or order a set of prepped EQ Magnum heads from them that're already drilled for an LA intake.

I just think that the LA motors and the Magnum motors are similar enough that it could be done and get it passed the smog guys.

One things for certain... I'm glad I don't live in California!!!

hear that...smog sux... should be a tailpipe only...but its not.

The easiest way to do this would be to buy a running 92-93 pickup and swap the 78 body onto it. In fact you could even leave the 92-93 cab on the frame and just swap on the 78 fenders, hood, doors and box. It is a total bolt on. You can even leave the 92-93 rad support and modify it for the round headlights. The rest will just drop right on. You will have the squared off roof but who will actually notice?
This way you could have it done in a weekend or two In your driveway and no engineering a fuel system etc.

Step One: Move near where I live, in Tennessee or Kentucky.

Step Two: Install the engine and transmission combo YOU prefer.

Step Three: Drive the truck.

I have a '78 Dodge 1/2 ton that came stock with a 360 and no air pump. What would happen if I moved to CA? A little off topic but I'm curious...although there's not a chance in *bleep* I'll be moving to CA.