We'll gladly trade a stock, cushy ride for better hook at the track and firm handling. Time and money is well spent in preparing the rear suspension to exceed stock-type performance limitations. Eaton Detroit Spring custom-built us a stronger set (an extra leaf on each side for less spring wrap) of the 440/426 Hemi-type leaf springs. QA1 sent us a set of their ultra-high-quality adjustable shocks (PN TC1539P). After cleanup of all the suspension parts (except the new shocks) we used Eastwood's paint products.