Pulley Size/Fitment: Z34 vs. R35

sloboi

Alas...all this talk of torsional vibration has shaken me timid (pun indeed intended). I'll be going boosted very soon, and am looking for a replacement to the OEM crankshaft pulley. I've had the OEM size Stillen lightweight pulley installed for about 3000km with no discernible negative repercussions--that being said, I don't want to take any chances with the volatile mistress that is Forced Induction.

My internet detective skills have failed to yield any technical data on the stock R35 crankshaft pulley. Vital information such as diameter, serpentine ridge height (where the ridges start in relation to where the base of the pulley will sit), or even compatible belt width.

Using my eyeball deduction method, the R35 pulley and ours look very much similar in size--save the more robust extension downwards from the ridge, where our pulley just stops. From what I can tell, the "key" to the crankshaft it self is also the same.

What I would REALLY like, though I accept the unlikely hood of this request being answered, is a side by side picture comparison between the Z34 and R35 pulley. If they do indeed match, I will most likely purchase the Boost Logic GTR Crank Pulley, which is using an OEM size, and ATI's dampening technology.

Thank you all for your help, and have a greatastic day--supercalifragilisticexpialidocious, even.