When it comes to Engine Mounts, Holley is Level 7's go to mount. These fit the 1973-1987 Chevy/GMC C10/C15/C20 Series 2WD Truck with a GM LS or Gen-V LT Engine.  They also work with the 1973-1982 Blazer/Jimmy 2WD.  

These new premium engine mounting brackets have been redesigned to allow GM LS or Gen-V LT engines to be installed in the 1973-1987 C10/C20 Trucks. The modular design of these brackets allow engine changes from LS to LT w/ a change to the clamshell components only. The same mounting brackets, polyurethane inserts, and crossmembers fit both LS & LT engines.

FEATURES

• Revised Design to Allow GM LS & Gen-V LT Engines to Be Installed in 1973-1987 Chevy/GMC C10/C20 Series 2WD Truck & 1973-1982 Blazer/Jimmy 2WD
• Welded Steel Construction w/ Black Finish for Light Weight, Durability & Corrosion Protection
• Replaces Original Frame Stands
• Allows Use of Low Mount A/C – for Both Truck Style Accessories & LSA Supercharged Engine
  
• Works with Hooker Cast Exhaust Manifolds – Additional Headers Will Also Be Available