I just used steel plate and square tubing to make an adapter that fit on the RPM Air-gap intake.
I actually did make an adapter to run a single carburetor on it but the gas pooled and I gave up on the idea. I needed to get it running and just took it all off. I'm defiantly going to get it going again one of these days. For me, I enjoy the fabrication end and hate the tuning.
These blowers have LOTS of potential on 4 bangers, straight sixes and V-8's. I used to rebuild and sell Eaton blowers till the pick N pull tripled their prices. Everything inside uses cheap off the shelf parts, bearings, seals ect.
The design probably isn't the best but keep in mind I asked for help on many message boards and most of the time all I got was go buy a kit.