I am asking for suggestions to lighten the 26.6 aluminium seat-post and quill stem on my current Neo-Retro project that I've recently finished..The new modern drive train and custom built wheel-set has turned a 1970's frame into a real nice ride...but if I could think of something to replace the seatpost, quill stem and especially handlebars I could really make it Great Again.

Who has good suggestions?