A nice setup should (rebuilt) go for about $1200.00. A setup that needs a rebuild about $800.00. Be shure that you are getting the period correct carbs and a Ford manifold. I ran this setup on my 67 390 Mustang and it was very nice. Excellant throttle responce and driveability! The sound when you open it up is also very nice!Adjusting the linkage is very important. There is a specific order in which to set them up. Once you set them up they stay and need little work after that. This guy knows how to set up a tri power unit and he sells a tech piece to explain in very easy to follow instructions on how to get them right. Here's the link
Bratland
Good Luck, Sal.