Landcruiser steering moves side to side on acceleration after a 2.5" lift with UCA's & wheel spacers. I let off the gas pedal and no issues.

erm , we are an L200 site primari;y so I can't say I know much about Landcruisers, but I'd be rechecking all fixing points of the lift and spacers. And it all depends what you mean by steering moves side to side...did you put the lift kit/spacers on , or get it like that ... because it may just be wear in steering rack , ball joints ...anything connected to the steering really ...even under/over inflated tyres