89 Van starter and alternator

Starter, yes, it's a direct drop-in. Alternator, you have to take ½" off the "bottom" (pivot) bracket for it to fit; electrically it'll hook right up. But be careful, the lowest-output alternator available on the '89 van was a 90A unit, and you don't want to drop that into your '72 without first upgrading the charging system wiring. See here.