There are many adjustable racing struts for sale. Penske's best and most expensive. Chinese versions as cheap as $1100 for 4 new.
I would assume you just have stocker non adjustables? Call or email JonB as
www.partsrack.com and ask him. He'll get you what you want and will supply new, used or race quality shocks.
There's a big improvement in steering feel and reaction if you upgrade your steering box rubber bushing with aluminium (read How To on this)
Sean Roe also has experience racing and building race cars etc.
www.roeracing.com 
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