............. I JUST completed this swap on my big block Belvedere. Here's what I did:
Show up at your local VatoZone (or your favorite chain parts store, whatever it may be). Ask for an alternator for a 1991 Toyota 4Runner with a 2.4L 4 CYL--THIS is important because that is how you get the V-belt version and avoid the serpentine pulley version meant for the V6 models! I believe the 4x4 version gets you the 70A model but at that point, you can ask about it while they have their computer screen open. They will have apx. 2 of these on their shelves. I just got their reman with the lifetime warranty!
I DID NOT have to order special brackets, but I DID have to space the alternator properly for pulley alignment if I was going to use the stock brackets, which is what I did. I needed to space the front-side of the alternator back 1/2", which is about the height of 1/2"x 13 nuts! The back of the alternator will depend on your combo. You will also need the right metric bolt on the small ear where the slotted bracket holds the alternator. Pick this up at the parts store while buying the unit unless you have a well-stocked bolt pile.
You can hook up the 3 wires in the back with common female spade connectors, or do what I did and order this:
1 x Connector Nippon Denso Alternator Repair Plug Harness Toyota Honda Lexus | eBay
I pulled the L-terminal/pigtail out of the connector since I'm not using the battery light.
I wired the car to supply battery sense and Ignition terminal input to turn the regulator on. All I have to do now with an alternator/regulator problem is take this unit to an AutoZone and take them up on their lifetime warranty! The pulley should always be a single V-belt, ready to go if I do that!
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David