Fits GM 1973-1998 K10/K1500 4WD Trucks;Standard Engine Mounting Brackets – for Four-Wheel Drive 1/2-Ton Trucks; Standard Engine Mount Brackets (WB130051, WB130055) are Designed for Use with the Factory V8 Engine Isolators and Provide a Simple, Cost-effective Gen-V LT Engine Mounting Solution ; Fore/Aft Engine Mounting Engine Position Options – Optimizes Powertrain Placement Based on User-selected Transmission, Transfer Case and Driveshaft Compatibility/Retention Priorities; Forward-Bias Engine Location Maintains the Stock Location of the Transfer Case and Driveshafts with 6L80/6L90 Transmission Installations in 4WD Applications; Rear-Bias Engine Location (Stock Bellhousing Plane Position) Allows an Existing Transmission Transfer Case and Related Driveshaft(s) to Remain Undisturbed, if Desired.; Standard Mounting Brackets are Engineered to Accommodate either Engine Location (Dual Mounting Positions); Compatible with Hooker Blackheart BH13272 LT Swap Headers for Racing and Competition Applications; Factory Driveshafts and Transmission Crossmember are Re-Used with Engine Swap; Fabricated 1/4" Steel Plate Construction - Provides a Strong, Durable Mounting Solution; Raw Un-Coated Finish - for a Great Value; Allows Use of Electric Cooling Fan, or Factory Vortec Mechanical Cooling Fan; Compatible Oil Pan: 302-20;