Follow the three stent below to utilize the 1975 spring charts 1 Select the model desired with the base spring weight cn Chart A 2 Then select options accordingly shown on Chart B and add that weight to the base spring weight 3 When accumulated weigh has been determined refer to chart C and select correct spring CHART A 1975 CORVETTE BASE SPRUNG WEIGHT Few E WZ37 Conrette 2 Dr Cpe 714 784 5 IYZS7 Corvette Convertible 714 5 790 5 CHART B 1975 CORVETTE n r o orriom wemrrrs F A31 Power Windows 2 0 1 5 C07 Auxiliary Top 5 0 29 5 C60 Air Conditioning 31 5 8 0 J50 Power Brakes 4 5 0 L82 3504 B C Spec Hi Perf Engine 5 0 1 5 M40 Hydramatlc Transmission 18 5 8 5 N41 Power Steering l2 5 0 U5B Stereo Radio 5 5 3 5 U69 AM FM Radio 3 5 3 5 CHART C 1 975 CORVE l l E FRONT SPR INGS GROUP 7 412 REAR SPR I NGS GROUP 7 503 avenue WEIGHT mer N0 svnumc wsicwr PART N0 All wstd susp 0 774 346939 All w std susn All 370388 775 Over 346943 Au wh l mp All anosie All iw H sum zmgeu GM PARTS DIVISION GENERAL MOTORS CORPORATION CI lEVROLET 1 4 1 000 GROuP 7 4 c REV 5 so