i have three option on doing this to a single arm mini. could use some suggestions

option1- move the arm mount out to the lower frame rail. this gives me 2.75" on each side. a reputible builder told me this will cause it to dart. why??

option2- 2" wheel spacers. will this cause alot of bump steer???

option3- convert to dual a-arm using stock take offs from a drr or apex...

thx for the help