Intakes are available, just not cheap.
BDS sells them, for example. Also an Australian guy casts his own.
Best plan is to buy a used one for about half of the ridiculous price BDS, INDY, etc charge.
Drive is also a little problematic - meaning you can get it from the various blower shops, but they don't float around in the used market so much.

Good luck,
Ran

"Hey mister, something's wrong with your car, it idles roughly" - number one comment I got in Israel when daily driving a 70 Barracuda with a lopey cam.

Currently working on - 1966 Dodge A100 van 318/auto
Finally - disc brakes on the front.
In the plans - rear disc brakes, B&M 250 blower