I am swapping a 460 into my '79 F-350 4x4. The old fan shroud is in about 6 different pieces, so I am needing a new one. My question is, should I get the same as before, or get one for a 460? The casting number on my existing shroud is D7TA-SA, and this matches up to the correct one for the original 351M. I am planning on trying to use my existing super extra cooling radiator, so would a shroud for a 460 even mate up to the radiator? Thanks.