Walter, that's a huge pump. Then again, if your HP number is really high, you might need it. If I am not mistaken, the wiring for a roadster is pretty similar to a coupe. In that case, you should have everything you need in the RF harness to power your pump. You'll obviously need a hanger to support the proper tubing size. But other than a regulator and return lines, I don't think you'd need additional parts. The listing for the 18638 states that it fits all hangers, so I would guess you'd be OK.

The charcoal can is a good idea for fumes irrespective of what pump you use. There are a number of threads on this forum that describe how to make one. It will take you about 30 minutes to put one together.