Listed as: " '73 & Up Poly Spool 273/318 or 340/360 Replacement Kit Original V8 Spool Mount Replacements available for '73 & up A,B,F,M,J-Body 273, 318, 340 and 360 engines. Kit includes powder-coated brackets, polyurethane spool inserts, grade 8 bolt package." http://www.engine-swaps.com/Pages/InstructionPages/PolySpoolSB.html