'73+ A,B,C,F,M,J-Body Big Block Mopar to Small Block Swap Down Kit

Easily replace your blown Big Block 383, 400, or 440 in your '73 & Up A,B,F,M,J-Body, and 74+ C-Body with a Small Block without changing your K-member.  Our kits allow you to directly bolt a 273/318 or 340/360 onto your original Big Block K-member with no additional fabrication. Kit includes powdercoated brackets, polyurethane spool bushings, and grade 8 hardware kit.  Made in the USA!

Part Number: 73PB-318 - Big Block K-Member to 273/318 Kit

Part Number: 73PB-340 - Big Block K-Member to 340/360 Kit