Few things... Why did you remove the thicker front swaybar? 195-70s are going to be a lot taller, are you looking for taller and/or wider? I'd go for 195-65s, they're what I currently have on my 142. I've never been a fan of Michelins, too spendy for what you get. Which model tires do you have? Wider wheels help with the feel a little bit if you have skinny ones. What are the part nubmers? I think George knows some of the part numbers. I can check mine on the 142, they're 5.5" wide. The thicker swaybar will help with the uneasy feelings on the highway, and keep the car more stable in all situations.

You say it feels as if there's a lot of weight in the back, what makes you feel like this is the problem? I think it's normal for the PVs to be a little tail happy, but I don't actually own one nor have I driven one so I don't know from experience. The thicker front bar would help with this in most all cases. Why did you remove it?
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Kyle - '68 142? - Oregon Volvo Tuners?