Thanks for the quick responses guys.
I am currently trying to decide between the escort and the tomei lock kits. I know that tomei has a pretty good history and make plenty of quality parts, but I'm uncertain of which to go with.
One is a "bar type", and the other is a "shim" type. That's what I'm calling them anyway. The escort racing kit is basically a bar that replaces the hydraulic steering unit and holds the rear wheels in line. The Tomei kit appears to keep the hydraulic steering unit in place, but puts brass shims in the free space it has where the wheels would be able to pivot side to side. The tomie kit is kind of a challenge to install compared to the escort racing one. I'll post up some links so we can all get a better idea of how each kit works and maybe future people with this question will find what they need thru the search option.
here's what I have been able to find...
A link for someone using a stillen kit on a 300sx, this is the bar type (vs. the shim type) kit and essentially how it would work. Note that he had a h*ll of a time getting it and doesn't recommend them, but it still shows the basics of the install.
http://stillensucks.com/Z32/HI....html
And here is a VERY informative link for installing the tomei kit on a skyline. Again the install to a 240 will be a bit different but still ought to run about the same. It seems a bit more complicated because it depends on being able to work hicas in the hicas check mode to install the brass shims. At least the way these guys did it.
http://homepages.tig.com.au/~robs/hicaslock.htm
I'm trying to decide which of these would be better. I would prefer to be able to put the original hicas system back on and into effect at some point, like if I were to sell the car, which makes me shy away from tomei's kit slightly, but thiers seems to be better in terms of the whole system. Installing the shims seems a little tricky too. The escort racing kit would save some weight.
***Also***if the escort bar kit wasn't quite the right length it has a slotted hole for some wiggle room to assure a good fit and since it bolts up to the chassis (see stillen link) it would hold the rears in place even if there were a little bit of play. If the tomie kits' shims were a less than perfect fit, wouldn't there be nothing stopping the wheels from pivoting aside from the supposed oem lock hicas has when it detects a malfunction?
Any thoughts on which kit would be the better choice, given these concerns?