[djmtsu]

Let me preface by stating that I am not pissing in your Kool-Aid.

If you have the ability and money to put a 20B in an RX-7, than you better have the knowledge to set it up.

If you ask basic questions about what trans to use and such, you are not ready.

But, to stay on topic:

I used to have a picture of a custom intake manifold for a 20B. It consisted of 2 Racing Beat Holley carb intakes cut and welded together for the 20B. He then ran 2 Racing Beat Holley rotary carbs. This was for initial tuning only. Shortly after, 2 750cc double pumpers with a supercharger were added.

Conversely, you can pick up a 20B intake manifold from Tweakit.net. It is meant to be used with ITB's, but you can get Weber set ups as well.

Go to their website, and drool. Then you had better take out an equity loan. THEN, you can begin work.