They are beefy heavy duty versions of the stock 4x4 motor mount frame brackets
Remove the stock motor mounts from the block and frame
Nova 1973-1979
The stock main eye brackets have been on these trucks for some 40+ years and are typically pretty beat
Gen 5 LT motors HERE
LS Swap Motor Mount Kit 1973-1987(91) They are beefy heavy dutyApplications: Gen III and Gen IV LS motors ( LQ9, LMG, LC9, LQ4, LS1, LS2, LS3, LS7, LS9, LR4, LM7, L59, LM4, L33 LQ4, L76, LY6, LY2, L20, LH6, LY5, LMG, LC9, LH8, L92, L99, LSA) Probably a few we are missing since there are 40+ variants but you get the gist of it. Applications: 1967 1972 C10 C20 2wd blazer 1973 1987 (1988, 1989, 1990, 1991) GM Truck SUV 4x4 and 2wd (K10, K20, K30, K5, V1500, V2500, V3500, C10, C20, C30, M1008, M100 SEE BOTTOM OF PAGE