1. Frame should be boxed in the area of crossmember attachment; areas
   adjacent to welds must be sandblasted or ground clean.
2. Set the frame on sawhorses or a suitable working area and level the frame from side to side and front to rear, using a good carpenters level.
   A) Front to rear frame "rake" can be set at this time. (See Notes Below)
   B) For 37 Chev = 3-1/4 inch difference.
3. Square the frame by cross measuring.
   A) Frame may be a parallelogram (one rail behind the other)
4. Removing existing rear crossmember:
   A) Tack Weld in temporary straps across the top and bottom of frame rails about 12 inches in front of crossmember.
   B) Insure that frame rails are not sucked in at the bottom; some rails are twisted in at the bottom, possibly from overuse of the running boards in the past.
   C) Measure width of frame: outside measurement (OD) will be
   approximately 44-5/16 " at rear axle centerline.
   D) Rails may be "bulged" out at rear axle CL; due to axle bottoming on frame, or possibly frame was rear?ended.
   E) Repair or straighten as required.
5. Trim required amount off WEEDEATER ADJUSTABLE CROSSMEMBER.
   A) Amount trimmed off depends on whether crossmember is butt welded to boxing plates, or placed on inside of edge of frame rails and welded.
6. Bolt crossmember assembly to top of Jag Pumpkin using the tapered seat OEM Jag Capscrews. (Part # C17024 if you don't have them)
   A) Narrower end of center mount plate to the rear of car.
   B) Assemble lower control arms to Jag Pumpkin using fulcrum mounts, shafts, washers and spacers. (See our Catalog or Jag Manual)
   C) Bolt Pinion Support Bracket to front of Jag fulcrum shafts at this time.
   D) Centerline of crossmember and centerline of 2 Shafts should coincide.
   E) Shock bosses on crossmember and Lower Control Arms (LCA) should be parallel. (See Notes: #9 for shock lengths)
7. Position crossmember between frame rails. (See NOTES below)
   A) Vertical positioning of crossmember depends on desired ride height.
   B) For wheel base positioning:(See NOTES)
   C) Jag sedan pinion centerline will be parallel with the fulcrum shaft centerline.
   D) Jag XKE pinion centerline will point slightly upward at an angle of 5?60.
   (XKE's can be converted to flatter sedan angle:(NOTES)
8. TACK weld crossmember in place: DO NOT FINAL WELD CM IN AT THIS TIME
9. Attach pinion support bars to front pinion support tybar.
   A) Clevis ends attach to pinion support tybar.
   B) Capture bushing ends with teardrop shape gussets, 1/2" bolts, washers and nuts supplied.
   C) Adjust length of support bars to position capture gussets to lower edge of frame rails.
   D) Tack weld teardrop gussets in place.
10. Check that face of shock boss on crossmember and LCA are essentially parallel.
    A) Bolt a shock to crossmember shock boss and Jag LCA.
    B) If shock won't line up with both shock bosses:
    You Have:
    • Assembled Jag Fulcrum Mounts to Jag Pumpkin incorrectly.
    • Assembled Jag center crossmember mount plate backwards.
      (small end of plate toward rear of car)
    • XKE Rear End instead of a Sedan Rear.
    C) Shocks line up correctly: ALL RIGHT !!
11. Stand around and eyeball your work; does everything "look" right and straight?
12. Final weld crossmember in frame. (Have you read the NOTES yet?)
    A) Read NOTES before final welding.
    B) Read All NOTES before final welding.
    

NOTES
More than you really want to know...

1. We recommend assembling rear fender and running board or body to frame as a check for rear tire centering and desired height in wheel arch.
2. Approximate measurement from bottom of frame to top of 2 shaft is 4 to 5-1/2 inches at normal ride height. (We get 5-1/2")
3. Normal Attitude For Jag 1/2 Shafts at Ride Height:
   1/2 Shafts "Hang Down" Approximately 2 degrees
   (Outer Ends Lower Than Inner Ends)
   A) Check with Magnetic Protractor.
4. Bottom of hub carriers should be approximately parallel to ground with frame at normal rake.
   
   Yes, Dave; This is California: and we can turn straw into gold:
   send your old XKE inner Fulcrum Mounts and $ = We'll puss 'em out so's your pinion will lay flat too.
   
   A) Pinion centerline and All shafts should be parallel to each other in a side view. (BOTTOM of HC should be parallel with ground)
   B) This conversion is not possible with some 61 to 63 XKE's that have only two holes in each Inner Fulcrum Mount; your Fulcrum Mounts must each have 4 countersunk holes for this modification.
5. FOR 37 CHEVROLET
   A) Wheelbase measurement with Jag Rear will be 112-1/2 inches,+/?1/8".
   B) In general, top of Weedeater Crossmember will be even with top edge of the frame rail ?? depending on desired ride height.
   C) Centerline of crossmember to: (Same as center of 2 shaft)
   • End of frame rail = 32 to 32-1/4 inches. (We make 'em 32.0)
   • We Place Radius Rod Crossmember Ahead of Rear End: Center of Crossmember 65" Measured From End of Rear Frame Rail.
   • Radius Rod Length With This Set?up Would Be 32 inches long. (Length of Rod Only, Not Including Bushing Etc.)
6. 2-1/2 to 3 degree frame rake is desirable: ie: Measure from bottom of
   frame to ground; difference between front and rear frame rails will be approximately 3-1/4 inches.
7. Chev Rear Fenders Measure Approx. 71-5/8 Outside, so as a general rule, 15 X 8 with 4-1/2 backside wheel measurement will work.
8. Use 16 inch long shocks with our Jag straight rear crossmembers; We like Aldan adjustables (16" long extended)
   • If shorter or original shocks are desired, order optional dropped rear sliders for short shocks
     (original Jag shocks are 13-1/2" -extended.)
9. Measurements 6C 1, are approximate and for reference only,See Note #1
   

©Snow White Ltd 1990 (REV 3/91;7/04)