Identification Help

[i eat dirt]

hi all i have recently purchased a crashed r32 gtst rb20det off of my uncle and he said the person he brought it off done it up for "drift", i thought this is funny because it was an auto.

But after pulling the engine out and going to change the harmonic balancer it seems that the rb20det one was too small,

soo i since have taken the buggered one into a wreckers and he said that it was the same harmonic balancer as a sr20det??

now im not sure if he is high or labelled it wrong but it fits perfectly.

soo i need to know what the diameter of a standard rb20det crank is??

the diameter on the harmonic balancer that fits is roughly 30mm

any help appreciated

jason