Lm7 power steering pump swap

[FoxJ12]

70 1/2 ton- lm7 transplanted in.
Questions about the power steering set up:

What are the thread end sizes for the pressure and return hose of the lm7 pump?

Will a mid 80’s P/S pump bolt onto the lm7 mounting bracket?

I was thinking of using the 80’s pump on the lm7 bracket. The lines will be the same ends (theoretically anyway).

I’ve heard of changing the valve guts on pumps, but will I have to modify the lm7 pump to remove the 3rd line?

Thanks for the help.