<VV> Rear wheel hop during autocrossing

[Ebarr19 at aol.com]

I and others noticed rear wheel hop during cornering while autocrossing at  
St. Augustine, I had noticed it before but not as bad as this year ( maybe due  
to better tires and increased speeds ) . After talking with others they said  
maybe using stronger springs and adjustable shocks would help??
  This is a 63 coupe with a 64 rear suspension that the last owner had  
installed, while looking under it with all 4 wheels on the ground I noticed a  3/8" 
gap between the lower rubber bushing and the crossmember where it  bolts to 
the body, After putting it on  jackstands the gap is between  body and the 
upper rubber bushing. The sleeve is 11/4" in length and the bolts  were tight, 
which means the crossmember moves up and down. ( the bushings don't  look like 
they are overly compressed, the bottom is 1/2" the top 3/8'  )  
 My question is, is this normal or is there a difference  in sleeves from 63 
to 64 models and can I cut 3/8" off the sleeve to  reduce this slop movement 
????
 Thanks
 Gene Barr
63 coupe ( GEEZER ) autocross car



**************Need a new ride? Check out the largest site for U.S. used car 
listings at AOL Autos.      
(http://autos.aol.com/used?NCID=aolcmp00300000002851)