Originally Posted by
VanCo
On long mountain runs in 95 degree heat fully loaded I've gotten my EGTs up to 1500 degrees (I usually back off at that point). I have cooked OEM alternators under those conditions. We all know the alternator is snuggled up to the exhaust manifold. The GM handles it fine.
I run an offset mounting hole CS130D. It's hooked up using all the factory van wires, and keeps the warning light working. I chose this alternator because they are on so many GM vehicles, and they are cheap. Ease of fitment was last on my list, I wanted cheap and plentiful. The cooling fan is internal and designed so that you can actually duct the inlet air if you want. The alternator I have is 105 amps and is plenty for me currently. The CS130D can be directly swapped for the larger 150 amp AD244. These are stock numbers. There are performance options for both alternators. I chose a Delco remanufactured pick n pull alternator for $9 two years ago for the fitment.
It does take some creative fabrication to get it to bolt up. In my opinion it's totally worth it.