[wheelsquad]

I agree with Mac on this one. Sounds like the OP is just trying to overall match the stock offset in the rear. So whether you get to that total width by a high offset (stock) rim, or with a spacer and front offset rim, your hub/splines see the weight put on from the same width. Now if you go spacers to go wider than stock, now we're talking added stress.

Sam, delta steels are super durable. I'd get 2.5" spacers for each side of the rear, then get 4 identical rims and tires and then you can rotate front to rear and even out wear throughout their life. I wouldn't worry one bit.

 

[wheelsquad]

I was making the exact same point as Mac, apparently that wasn't clear, sorry. And it got muddied cause I wasn't saying anything specific about the 350D rear end. Point made, moving on for sake of the OP...