Rb26 Harmonic Balancer Questions

[kitto]

Hey everyone, so i'm building my engine, and i'll be changing to an ATI harmonic Balancer.

Now my question is, there are two different balancers (theres actually quite a few, but i'll be sticking with the OEM bolt on type), One is to suit an R32, the other is to suit an R33/R34.. Is it just the accessories such as power steering and air con that change between the R32 and R33/R34?

This engine is going into an R31 and i'm not the biggest GTR know it all so i'm having trouble trying to work out what i need to do.

I've already worked out that i need to make up a custom power steering pulley as the GTR balancer is a 4PK whereas the R31 pump is a 3PK and the offset of the pump is too far back anyway. I might be able to get away with an R32 NON Hicas unit but i'm not sure.

But my other concern is my alternator. I compared my RB26 balancer to my RB30 one today and realized the offset between the two are different. The RB26 alternator and water pump belt are about 2mm closer to the engine than that of the RB30. This might mean that i'll have to change over to an R32 alternator.

Any difference in the GTST and GTR R32 alternators?

Which ATI balancer have people used, there are two OEM options that you can choose, one for under 500HP and one for 600 - 1000HP. I did a bit of a search but came up with nothing conclusive.

Thanks, Daniel.