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42
MOUNTING FLATS
2. Weld J-box mounting fl ats to 
vehicle crossmembers as shown 
in FIG. 42-1.
WELDING J-BOX MOUNTING FLATS
FIG. 42-1
1/4”
4 PLACES”
POSITIONING J-BOX MOUNTING BRACKET ON FLATS
FIG. 42-2
MARK LINE
CUT OFF 
EXCESS
J-BOX
3. Position J-box mounting bracket 
on fl ats (FIG. 42-2). Mark mounting 
bracket position at the edge of the 
slide rail and cut excess length from 
bracket as shown in FIG. 42-2.
J-BOX MOUNTING 
BRACKET
SLIDE RAIL
CROSSMEMBER
STEP 2 - WELD J-BOX TO UNDERBODY - Continued
MOUNTING FLATS
NOTE: Grind galvanized surface material from areas to be welded.