Re: 350 swap
You can use the motor mounts and frame brackets from the '86. However the '86 frame is taller than the '60 frame, so a spacer on top of the frame will be necessary. The frame brackets used on the '73-'87 3/4 tons were a little shorter than the 1/2 ton brackets. There were V8 mounts used in the '60-'62 trucks, but they are quite rare. The other option would be the frame brackets used in the '67-'72 small block trucks. These frame brackets sat farther forward than the '63-'66 brackets, so they are shorter. The actual motor mounts for the small block are the same from '63-'72. Personally I prefer the '73-'87 style of motor mounts. They are a better design IMO.
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