I-6/250 with CS alternator ?

[88Ironduke]

So I have a nice CS alternator that had the right price tag, free. Its a pretty chrome unit but alas all things come with a price of some sort.

My question to the inline six gurus is about the mounting of the alternator. My truck did not have its original externally regulated alternator in place when I brought this home. But with the original single groove water pump pulley it was clear that the new CS style alternator does not line up with the groove on my stock water pump pulley. Did the inline 6's ever come with a lower alt mount that pushes the alternator further forward on the block?

I have a installed what I think to be a SBC water pump pulley for illustration purposes. The inner/aft groove lines up nice on the alternator and drive pulley on the crank. The outer/forward groove is where I should be at in a perfect world. Technically a guy could easily make this work, but its a smaller diameter pulley which would in turn drive the water pump fast than stock....

My fear is the coolant would be moving too fast and possibly cause an over heat condition due to coolant not having enough saturation time to pick up heat in the block. Or it would cause premature water pump failure.

Penny for your thoughts....
88Ironduke