<VV> bushing upgrade advice offered

[Sethracer at aol.com]

In a message dated 2/17/2013 7:59:01 P.M. Pacific Standard Time,  
corvairgrymm at gmail.com writes:

This  question is directed at the racing guys mostly.  I am upgrading my  66
Corsa coupe with autocross and road course events in mind and want to  start
replacing bushings and such.

Can anyone give me some advice on  what bushings and such to replace first
(I will have to do the car in  stages for financial reasons mostly)?  I'm
hoping for upgraded  bushings (Nylon?) where applicable, but no metal
bushings.  I plan to  stay in IS-3 class for now at least.  I don't mind a
harsher ride but  this car will still be driven plenty on the street. 
 
Probably better answered on FastVair, Ray - But here are my suggestions. 
 
Front: Replace both upper A-arm bushings on each arm with the harder  
Urethane rubber compound bushings from Corvair Underground. They offered two  
compounds in the past, not sure what the current status is. Do the same with 
the  inner bushing on the lower control arm. Take the caster struts apart and 
shorten  the inner sleeve to about 2/3 of it's original length. Use good 
replacement  rubber and re-assemble. Later you can replace these with the 
spherical joints  from VairFast in Virginia. Not recommended for regular street 
use. Put the Nylon  insert in the pitman arm. 
 
Rear: Again the harder Urethane rubber inserts from Underground in the  
trailing arm front tips. Underneath, Underground and Otto Parts/Clarks used to  
sell a poured Urethane replacement transverse strut rod. They are as stiff 
as I  would go on a street car. Again, I am not sure they are still 
available. Save  the Spherical replacements for real competition. For the toe-links 
on the  trailing arms, you can leave rubber at the trailing arm end and use 
a rod  end at the transmission mount. That means fabricating a pair of 
brackets  for the inner rotational points, but it seems like an easy task. Try to 
 duplicate the height of the inner rotational point to match the later  
bracket. 
 
Let us know how it goes! - Seth Emerson