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L&L Products 429/460 Engine Mount Stands Install Instructions - 1980+ #04-0425

L&L Products installation instructions for 429/460 engine-mount stands (1980 and newer), part 04-0425: install side frame perches and engine mounts, torque perches to ~50 ft-lb and mounts to spec.

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This document is the official installation instruction sheet from L & L Products, Inc. (Rowlett, Texas) for their 1980 & Newer 429/460 Engine Mount Stands, kit part number #04-0425. The kit contains four items: a driver side frame perch, a passenger side frame perch, a driver engine mount, and a passenger engine mount. The seven-step installation procedure covers safety precautions (approved safety glasses and proper safety equipment), removing the original engine from the stock frame perches, unbolting the stock perches and cleaning the engine compartment, installing the L & L frame perches using the original stock bolts torqued to approximately 50 ft-lbs, bolting the engine mounts to the 429/460 engine before lowering it into the frame perches, and finally torquing the engine mounts to 50 ft-lbs. A diagram at the bottom illustrates the L & L frame perches on the frame, identifying fastener part numbers including bolt N605932-S2, nut N620483-S2 (torqued 65-88 N·m / 48-65 ft-lbs), and nut and washer assembly 388049-S2, with the front of vehicle indicated. A partially visible second instruction sheet (© 1997) shows a passenger side mount photo and header/solvent notes. The main sheet is © 1994 L & L Products, Inc.

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Frequently asked questions

What parts are included in the L & L Products #04-0425 engine mount kit?
1 driver side frame perch, 1 passenger side frame perch, 1 driver engine mount, and 1 passenger engine mount.
What torque is specified for the L & L frame perch bolts?
Install the frame perches using the bolts removed from the stock perches and torque to approximately 50 ft-lbs; the diagram also shows nut N620483-S2 torqued to 65-88 N·m (48-65 ft-lbs).
What engines does this L & L engine mount kit fit?
It is for 1980 & Newer 429/460 engine mount stands — the mounts bolt to a 429/460 engine before lowering it into the frame perches.
Should the engine mounts be attached to the engine before or after lowering it in?
Bolt the engine mounts to the 429/460 engine before lowering it into the frame perches, then torque the engine mounts to 50 ft-lbs.
What fastener part numbers appear in the installation diagram?
Bolt N605932-S2, nut N620483-S2 (65-88 N·m / 48-65 ft-lbs), and nut and washer assembly 388049-S2.

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