It should fit/work just fine.

Pull the whole instrument panel from the dash and then remove the bad fuel/temp/oil cluster from the instrument panel assembly. Replace it with the working/non-leaking cluster from the donor.

You don't have to mess with the tach or speedo clusters.

Please don't junk that leaking gauge assembly either, send it to me and I'll see if I can resolder the bourdon tube...I've got a couple on the workbench to practice on, can't hurt to have one more.

I figure that one of these days, every one of those gauges will be leaking and there won't be any more parts cars to get them from. They'll have to be repaired then.

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Never a dull moment at Berry Hill Farm.