I just want to note that the AHH belt is not wider, it has a different part number, same goes for the tensioner, but I cannot physically see a difference between the two.If I had an 11mm pump on a 1z/AHU I would drop down to 50k belt changes or switch to the wider belt setup.
Andrew Libby is right....no shim BS needed...My ALH Pump swap is washer/shim free...Holy smoke, all you guys shimming the pump over are doing it the hard way. You just have to adjust the belt tracking by rotating the pump bracket. Sprocket down, lines up makes the belt track closer to the block.
It's not possible to use the ALH one it's completely different!Why not just use the alh pump and bracket instead of going threw the trouble of machining the old ahu bracket not sure if there the same or not but if someone knows it be great because I can get a 11mm alh pump off an automatic and the bracket if it bolts right up that would be great