1973-1987 4WD GM Truck LT Swap Parts

LT swap parts for 1973-1987 four wheel drive Chevy and GMC square body trucks: the 4WD LT engine mount and frame bracket kit for half and three quarter ton trucks, the cast aluminum LT oil pan kit, 400 LPH EFI tanks for 6 and 8 foot beds and for the Blazer, Jimmy and Suburban, the 400 LPH line kit, aluminum radiators in two heights, transmission mount adapters and LT accessory brackets.

Mounts for 4WD 1/2 and 3/4 ton
400 LPH tanks by bed length
Radiators in 18.5 and 20.75 inch

Price the swap in the LT swap kit builder. Two wheel drive truck? See 1973-1987 2WD GM Truck LT. Running an LS? Go to 1973-1987 4WD GM Truck LS.

$349.00 1973-1987 GM Truck 4WD LT Engine Mounts and Frame Bracket Kit

$669.00 1973-1987 GM Truck EFI Fuel Tank Kit - 400 LPH Pump - 6' Bed

$669.00 1973-1987 GM Truck EFI Fuel Tank Kit - 400 LPH Pump - 8' Bed

$669.00 1973-1991 Blazer/Suburban Fuel Tank Kit - 400 LPH Pump

$795.00 Fuel Line and Regulator Kit - 400 LPH

$991.99 1967-1987 GM Truck Radiator 18.5" Tall (Auto Trans)

$885.99 1967-1987 GM Truck Radiator 18.5" Tall (Manual Trans)

$1,362.99 1967-1987 GM Truck Radiator 18.5" Tall (Manual Trans) with Fans

$1,468.99 1967-1987 GM Truck Radiator 18.5" Tall (Auto Trans) with Fans

$1,468.99 1967-1987 GM Truck Radiator 20.75" Tall (Auto Trans) with Fans - HD Cooling

$1,362.99 1967-1987 GM Truck Radiator 20.75" Tall (Manual Trans) with Fans - HD Cooling

$991.99 1967-1987 GM Truck Radiator 20.75" Tall (Auto Trans) - HD Cooling

$885.99 1967-1987 GM Truck Radiator 20.75" Tall (Manual Trans) - HD Cooling

$39.99 Cadillac CTS-V T-56 / standard TR-6060 Trans Mount Adapter

$39.99 MG9 high-torque TR-6060 Trans Mount Adapter

$39.95 Cadillac CTS-V 6L90E Transmission Mount Adapter

$660.00 LT Series Alternator/Power Steering Bracket L83/L86 Truck

$1,190.00 LT Series AC/Alternator/Power Steering Bracket L83/L86 Truck

1973-1987 4WD GM truck LT swap parts

4WD LT mounts and oil pan

EFI fuel tanks and line kit

Truck radiators, 18.5 inch standard cooling

Truck radiators, 20.75 inch HD cooling

Transmission mount adapters

LT accessory brackets

What the 4WD LT mount kit covers

LT engine mounts
Frame brackets
1973-1987 GM 4WD trucks
1973-1991 4WD SUVs
Half ton and three quarter ton

1973-1987 4WD truck LT fitment notes

BRP lists the mount and frame bracket kit for LT engines in 4WD half and three quarter ton trucks, plus 1973-1991 SUVs.
This page has no LT conversion kit, crossmember or headers for the 4WD truck. The 2WD truck kit and its 2WD crossmember do not apply.
The bed length tank kits list the C10, K10, C15 and K15, and the third kit covers the 1973-1991 Blazer, Suburban and Jimmy.
All three tanks hold an in-tank module with a 400 LPH pump, which BRP rates for supercharged trucks or over 550 hp.
The 400 LPH line kit has an adjustable regulator, a boost port and a screw together rail fitting, and BRP names it as the line kit for LT engines.
The radiators list 1967-1987 C10, K10, C15 and K15 trucks plus the Blazer and Suburban, each for automatic or manual with or without fans.
BRP says its mount adapters are meant to be used with BRP transmission crossmembers.

Fitment comes from the BRP product listings. No 1973-1987 4WD truck LT install guide is posted, so tunnel, oil pan and front axle clearance are not covered here.

1973-1987 4WD GM truck LT swap FAQ

Do the 4WD LT mounts fit a three quarter ton K20?

BRP lists the kit for 4WD half ton and three quarter ton trucks from 1973-1987, and for 1973-1991 SUVs.

Is there a 4WD LT crossmember or conversion kit?

Not on this page. Only the 4WD LT mounts and frame brackets are listed. The 1973-1987 LT conversion kit BRP sells is for half ton 2WD trucks.

Which fuel tank fits a K5 Blazer with an LT?

The 1973-1991 Blazer and Suburban tank kit, which also lists the GMC Jimmy. It carries a 400 LPH pump and pairs with the 400 LPH line kit.

Is there an install guide for a 4WD truck LT swap?

Not yet. The LT guides BRP has posted cover the 1973-1977 A-Body and 1994-1996 B-Body.

1973-1987 4WD GM Truck LT Swap Kit Parts