73 dart doug's D450 headers?

In my 73 Dart we are building a strong 360.
On the shelves I have a ceramic coated set headers, Doug's D450. That's a set for early A bodies.
Can I put them in? What needs to be done?
We already found out that the drivers side is close! Only thing is to grind away the lever of the column shift. (just put an aftermarket floor shifter in).

Specs of the car:
73 Dart, slant six K member with Schumacher conversion mounts
360 with the correct oil pan (392 stamped in)
Column shifter
Power steering (manual box available, if necessary)
727 tranmission
Stock starter. (might need a mini starter?)

Has anyone done this before? Some hammering if needed no problem. The headers are pre-used and already have all kind of scratches.