Hey, I was wondering how you were coming along on your project.
I am doing the same thing as you.
I spent a lot of money fixing up my s13 with upgrades.
I ended up taking everything out of the s13 as far as suspension and the sr20.
Im currently modifying the s30 to mate with the s13 rear suspension.
Here is my car domain address
http://www.cardomain.com/ride/3934365/1974-datsun-260z