[DeTomaso] Non pantera suspension question

[Kurt Byrnes]

I've been struggling to get my vintage race car to hookup coming out 
corners.  It seems to want to lift the inside rear wheel enough that I 
loose traction and just spin the tire instead of accelerating out of the 
corner.  You can hear it pretty well a little past 50 seconds in this 
video. https://www.youtube.com/watch?v=NQDhmizu3Go  I'm not sure if I'm 
driving harder or it's getting worse but I do notice it more and more.  
It does seem to be more pronounced in right hand turns.

I've lowered the car a couple inches at both ends, have stiffer front 
springs and a 7/8" solid roll bar on the front.  I changed the rear leaf 
springs to a slightly newer model that are supposed to be a little stiffer.

Not sure what to try next.  I have to run the original suspension 
geometry and lever shocks but I could change the oil in the shocks to 
either thicker or thinner viscosity.  Stiffer or softer front springs?  
Any other suggestions?

Kurt