Your search for "custom race valved" revealed the following:
Complete Kit - Datsun 510 suspension (strut housings not included)
$2,499.00
Datsun 510, custom complete suspension kit. This kit includes all necessary hardware to convert your 510 to coilovers. THIS KIT INCLUDES THE FOLLOWING: 2 Ground Control / Koni custom valved single adjustable strut inserts,bolted into existing housings.2 Koni single adjustable rear shocks 1 Pair front adjustable Camber Plates.4 Ground...