I do not have the info that you need on the diffs but would very strongly advise that trying to hot rivet by hand will be a disaster ! The rivets are not big enough to hold their heat for long enough to fully form the heads before they go cold. The result will be that the shank cannot contract after the head is formed and the rivet will not be either swelled out and fully filling its hole or be in axial tension due to its contraction. It will come loose very quickly.
Cold riveting in a press is fine for things like assembling chassis where the rivets are quite short but this is an application where the contraction of a hot rivet after it is set in place is very usefull. If you can cold rivet in your press I would strongly suggest that setting up a little furnace and having a helper to put the rivet in the hole before the seccond man squeezes it in the press would make a much better job. Speed is critical here as is the length of the rivets. I expect that they are not supposed to be mild steel either though I do not have information on what the correct material should be.
It will be very interesting to hear how you get on...
David
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