Pro street stock shocks are designed to replace the stock shocks in the original mounting locations. Three-way adjustable design with easy up, 50/50 and tie-down settings.
To adjust compress the shaft all the way in (collapsed). Keep light pressure on the collapsed shaft and turn counter-clockwise until you feel tang drop into slot. As you rotate clockwise there will be 3 sets of 3 different adjustments (9 positions). Continue to rotate until the mark on the shaft aligns with the desired dampening letter, marked on the shock body. If in question you will note the difference by hand stroking the shaft in and out.
Pro Shock Application Chart (GIF)
GM Mid Size and Full Size, Ford Mid and Full Size, 1970-81 Camaro, Firebird. Mercury & Cougar.
8.5" compressed/13.1" extended