Bushings material on control arms top and lower differ
 

I bought polyurethane bushings for my control arms. I'm just going to order new upper control arms and rebuild the lowers. I already have the poly bushings but the new control arms I'm going to order have standard bushings.

Will this effect anything driving wise?

Why not just rebuild the uppers with the urethane bushings too?

But to answer your question, I can't image it making it much of a noticable difference.

The tops are kicking my ass, it is much easier to just replace the tops with pre built ones.