It is well known these are by far the best front springs available for street (and track) for your Datsun Roadster. Perfect height/stiffness compromise. Firm ride, but not harsh. 
 
These are the real deal - developed and manufactured for Mike Young.
 
Unmatched ride, stability and comfort when paired with Sport Touring or "Koni-Medium" calibrated Bilsteins.  
 
These are absolutely the best spring for street and vintage racing-hands down.  Cheap copies and crappy "supercomp" springs don't compare. Those are a mistake!
 
See the combo deal for best pricing.  In stock for immediate shipping. 
 
 
These springs have decades of proven performance.   DRP always brings you the best.