Yep, revalved Koni's (SPSS3 valving or you may be able to buy "off the shelf" race valved Koni's which are the same thing) combined with Ground Control threaded body coil over perches are a great combo. These Koni's can handle rates up to, and a bit above, 1000#.

Spring rate is something to research and be prepared to tune... most folks run a rear stiff bias. i.e. 600F 900R