Arguably the best solution I've seen for passenger seat tilt mechanisms is by Lick Creek Restorations.
It's not on their website but I saw it in one of the broncos (I think The Duck) that they brought to Super Celebration.
Looks like any seat could be mounted to it and it bolts to the lower floorboard and allows any seat to be pitched forward to allow access to the rear.
Really slick setup.
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