Triumph/TR3A Projects:Generator to Alternator Conversion

From the back
Showing the spacers on the adjustment arm.
I have since moved the alternator forward because it wasn't in line, and it was causing the belt to wear down and eventually broke the pulley. Hopefully I'll get some photos up soon, but you can eyeball it pretty easily, I'm surprised I didn't notice the misalignment when I first set it up (I think the directions were wrong on the conversion).
What happens to the engine pulley

Photo album generated by album tool from Marginal Hacks by David on Thu Nov 12 16:04:13 2015