I'd think a tubular k-member wouldn't do much except save some weight and space. I have bilsteins struts and shocks on mine and love them with the Ford C springs. If you plan on using your car as a daily driver and dragging it you might want to look into tokico adjustables (though from your description of only 300 horsies it sounds more like a set and forget setup, in that case, I'd tag the bilsteins)