Front coilover adjustment question...

[ammrpm]

I have coilovers on my 93 ZR-1. They were on the car when I bought it this past January. I just had my front shocks rebuilt by Bilstein. I am putting everything back together at the moment. The car is still up in the air. Right now the shock/spring/coilover has been reassembled and placed back onto the car. I have attached and torqued the lower shock bolts to the lower a-arm. Should the upper shock nut be installed and torqued before adjusting the coilover? Does it matter if the center shock shaft spins as you are adjusting the coilover? I noticed once there was enough pressure between the spring and spring hat that the whole spring/hat/shock shaft was moving. What is the best way to adjust the ride height on these things? I can tell I will need to hold the inner threaded shaft with something. I am probably going to use a big pipe wrench on that. I also have a spanner wrench to turn the adjustable spring collar seat.

Any help would be greatly appreciated!

Aaron