Magnum swap plan

You should be able to use your current throttle bracket by bending the tabs to 90 degrees in your vice. Your old valve covers will bolt up too but might need a slight trim to clear the intake runners. I just did this swap into my 67 slant six Dart. I have that same cam grind from Oregon in mine and love it, I used the same Hughes springs. With thin head gaskets and a deck/head true up shave I needed slightly shorter pushrods than stock. don't forget the fuel pump eccentric and cam snout extension like others mentioned, i dressed mine out to look period correct too. Holler if I might be of further assistance.