Greg -
At the risk of me possibly misunderstanding what you said in describing RX7 struts -
The ball joint on the 1st gen RX7 is bolted to the steering arm, not the strut directly. The steering arm is then bolted to the strut, which includes the stub axle and attached hub, strut tube, etc. This arrangement is used on (I think) all RWD Nissan/Datsuns until the 240SX (510s, Zs and ZXs thru '89, 200SX for sure). Plus 1st Gen RX7s and I'm sure several others.
Unlike a strut which bolts directly to the ball joint, adjusting the roll center on the RX7 through adding a spacer at the bottom of the standard strut is very simple. The one piece strut I have (on a 1974 Capri) is a much trickier thing to modify, because the ball joint hole is part of the stub axle forging. I've never been brave enough to try welding an extension to that part and, fortunately, it isn't much needed on the Capri.
Tom Lyttle
Decatur, GA
IT7 Mazda - 2006, 2008 SARRC Champion
ITS Nissan 200SX - finally running correctly
FP Ford Capri - waiting for a comp adjustment
GT3 Dodge Daytona - what was I thinking?
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