126 Wheel question
 

In advance, Yes, I have searched and read, lots, but I am still unsure based on my readings. So I am looking at buying new rims for my 85 300sd. I have the stock 14 bundts right now. I am looking at some 17 staggered 7.5" and 8.5" with an et of 34. Also looking at some 8x16 et33. Both obviously 5x112. Will these fit my 300sd without modifying the suspension/steering/brake lines? Would I need to use a spacer? I know that my car was an et11 up to 21.5 from my understanding. Thanks in advance. I know this topic has been covered ad nauseum but after all the reading I was still unclear. I need to make a decision on both by tomorrow. Thanks in advance.