Power Steering Pump differences
Here's a quote from Slantsixdan about this pump pictured. The pump in the pic appears to be a Thompson/TRW item. Federal and Thompson pumps are interchangeable on the same brackets (though you have to check pulley alignment; there are multiple different pulleys for each pump); Saginaw pumps take different brackets. The early Saginaw pump has an oval filler neck and a scalloped plastic combination cap and dipstick. The late Saginaw pump has a "ham can" shaped reservoir rather than a round section housing the actual pump at the bottom of a filler neck, and still uses the scalloped plastic combination cap and dipstick.
Here's a quote from Slantsixdan about this pump pictured. The pump in the pic appears to be a Thompson/TRW item. Federal and Thompson pumps are interchangeable on the same brackets (though you have to check pulley alignment; there are multiple different pulleys for each pump); Saginaw pumps take different brackets. The early Saginaw pump has an oval filler neck and a scalloped plastic combination cap and dipstick. The late Saginaw pump has a "ham can" shaped reservoir rather than a round section housing the actual pump at the bottom of a filler neck, and still uses the scalloped plastic combination cap and dipstick.
