BORGESON steering box

What kind of engine do you have? I've got a '68 Cuda Formula S with a 340 and I'm looking to install one one of these boxes and the Borgeson Saginaw pump. Just wondering if you had any issues making everything fit. My car has a manual box currently but originally had power steering from the factory.
The only problem I had was one header pipe was hitting . I am running dougs headers 1 5/8. I tried to dent the header but was not able to. I put a 1/4" shim under the driver side motor mount it worked out fine. I love the gearbox like driving a new car.