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Return to Parts List Category : D- Big Block (Low Deck) : Valve Springs PAC PAC-1220-16 BEEHIVE, 370 RATE 147# @1.900 1.210 CB USE RETAINER 1280R $194.56 This 1220 Beehive spring is suitable for Big Block hydraulic roller, flat tappet, and mechanical flat tappet cams up to .600" lift. Use with 11/32" Valves HUG 1280R - Retainers HUG 1380 - Spring Cups HUG 1302 - Locks Small End I.D. (in) .650 Large End O.D. (in) 1.450 Install Load (LB) 155.0 Install Height (in) 1.880 Open Load (LB) 377.0 Open Height (in) 1.280 Coil Bind Max 1.210 Lift Max (in) .600 Rate 370