A better tire will make a world of difference when the time comes to see how it really handles. The 451’s are a nice “get me by tire” (read as inexpensive alternative), but are not known for their outstanding roundness or lateral grip when pushed, especially when hot. Most have problems with high speed vibrations that cannot be balanced out.
The steering and suspension pivot points are all OE in a 1985 vintage chassis and we think they are OK? I can tell you right now that they are not. You need to be replacing the ball joints and linkage, even if you think it is OK.
Poly in the rear bushings, please search that one.
QA1's are fantastic shocks, great move purchasing those. ST springs are OK, made by Eibach last I checked. They are not really performance springs as much as they are cosmetic springs. The rate on them is fairly low; 450ish IIRC.
Frame bracing always helps, smart move.
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Dennis
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