I do seem to remember I have turned down ali spacers so I might have gone for the longer spring with a spacer (of sorts) to try and get as much as I could in the height.....one day I will write this stuff down....
When I built the blue Peerless, I used updated (380 lb rally) springs with no spacers. Along with 1 degree negative camber this gave a one inch low ride height and it steered and handled like a dream. Nylatron bushes all round, and no need for an anti roll bar.
However, it was forever bashing the exhaust and the spare wheel well on road humps and entrance ramps. Leaving the house was like navigating a maze.
The Warwick has standard springs and thicker spacers (from a dolomite) which gives one inch high ride height. Compared to the Peerless the bump steer and understeer on turn in is noticeable, but not impossible to live with. A geometry correction kit from Revington has helped to mitigate the handling effects, and removal of the spare wheel well, and a high level exhaust means road humps are no longer a problem.