What was the condition of the strut bearings? If they were broken or dry it may cause this, although frankly I'm not sure if it would feel one sided. I would check tire pressures first.
When I had mine apart to replace the top strut bushings, I cleaned and lubed my bearings (really a plastic bushing) with anti-seize. It felt like an improvement.
Mark Plaia designed and sold replacement bearing plates that used actual bearings. Perhaps he will chime in with more advice.

Gregory Smith

'87 Bertone X1/9 Corsa
'88 VW Vanagon
Olympia, Washington, USA
http://gregoryfsmith.com