I don't think there is a 'bolt in option' as such. The 1.6 vitara swap with the appropriate adapter plate etc would be an easy enough swap in a later model Sierra. For some reason I 'THINK' the 1 litre mounts are different from the way a 1.3 litre is mounted, thus making most adapter kits redundant. The kit I a talking about uses the standard 1.3 litre gearbox. So this would need to be sourced and mounts etc fabricated also
All this is said in the 'I THINK' mode, I could be wrong....it's to early to think straight
