Hi Gman,
Looks like you are planning to run the same combination as me.
I currently run a 460 BBF mated to a toploader using a 400 ford bellhousing. Had to have a 2mm spacer plate laser cut between the bellhousing and motor. Also don't forget to put a bearing on the end of the input shaft of the toploader, should fit snug inside the end of the 460 crank. Besides that run 11 inch centre force clutch or similar and a matched steel flywheel.
I am currently using a hydralic slave cylinder conected to the clutch fork, to do the changing as my car is right hand drive. If I did it again I would change to hydraulic release bearing.
Hope this helps.
All the best
