that's sweet. Looks like you've been doing some work.
One thing i see could cause a problem...Your string is going to go down through a hole,across the bottom of the chassis, and up through another hole to the u-bar. That's 2-3 spots that the string could rub through, plus make it not as smooth.
can you just goto any hobbie shop and buy a kit for a model low rider and if so how much are they are they easy to put togeather can someone pm the info i have this odd fetish for 61 impalas and im tired of buying already made models want to do something my way so please pm me