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Old 07-29-2024, 12:22 AM   #1
kitsbeach
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Frame cuts and fish plates

BUT...I also knew that the chance of me getting the zigzag cuts perfect would be near impossible.

The zigzag cuts are the most popular on this site and all over the internet, but that means 6 different cuts ON EACH SIDE. Getting them to match up perfectly would be difficult.

So I settled on nice big strong fishplates, with a good design, along with straight cut frame cuts.

Name:  wrong better best fishplate design.jpeg
Views: 154
Size:  43.6 KB

Basically wrong on the frame cuts and best on the fish plates.
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Kitsbeach (Ken)

1967 C10 LWB (now SWB) Fleetside 6cyl Saginaw three-on-the-tree "No Frills"

1980 C20 Long to short & static drop "Square One"
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Old 07-29-2024, 12:44 AM   #2
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The cuts

For the frame cuts I picked somewhere that would leave room for the fish plate to extend past the cut a lot without running into a spring hanger.

My location was a bit close to the cab, which made it a little hard to work in there later, but it was okay. I re-drilled the cab crossmember holes through the fishplate (trying to find a picture of that).

Anyway here are the cuts:

Name:  Frame cut location.jpg
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Size:  61.0 KB

Name:  Frame cuts-4.jpg
Views: 153
Size:  63.7 KB

I removed 14" from the middle and later will remove 5 3/4' from the rear (more on that later).
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Kitsbeach (Ken)

1967 C10 LWB (now SWB) Fleetside 6cyl Saginaw three-on-the-tree "No Frills"

1980 C20 Long to short & static drop "Square One"

Last edited by kitsbeach; 07-29-2024 at 01:17 AM.
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Old 07-29-2024, 12:45 AM   #3
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No turning back

And here she is cut:

Name:  Frame cuts she's cut 15.jpg
Views: 146
Size:  58.4 KB
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Kitsbeach (Ken)

1967 C10 LWB (now SWB) Fleetside 6cyl Saginaw three-on-the-tree "No Frills"

1980 C20 Long to short & static drop "Square One"
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Old 07-29-2024, 12:47 AM   #4
kitsbeach
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Cut and clamped

Name:  Cut and clamped -4.jpg
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By the way these jack stands are actually RV jacks, which made it easy to adjust the height precisely.
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Kitsbeach (Ken)

1967 C10 LWB (now SWB) Fleetside 6cyl Saginaw three-on-the-tree "No Frills"

1980 C20 Long to short & static drop "Square One"

Last edited by kitsbeach; 07-29-2024 at 01:13 AM.
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Old 07-29-2024, 12:56 AM   #5
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Fish plate design

Here's my fish plate mock up, all done with a grinder:

Name:  Fish plate design -1.jpg
Views: 150
Size:  66.7 KB

Name:  Fish plate design -2.jpg
Views: 147
Size:  58.5 KB

Name:  Fish plate design -3.jpg
Views: 147
Size:  66.8 KB

Name:  Fish plate design -4.jpg
Views: 151
Size:  58.5 KB

Name:  Fish plate design -5.jpg
Views: 145
Size:  103.9 KB

That metal is from the 14" piece of the frame that I removed.
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Kitsbeach (Ken)

1967 C10 LWB (now SWB) Fleetside 6cyl Saginaw three-on-the-tree "No Frills"

1980 C20 Long to short & static drop "Square One"
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Old 07-29-2024, 12:59 AM   #6
kitsbeach
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Fish plate mock up

Bolted the fish plate in place using cab crossmember bolts and some more bolts later (no pics tho):

Name:  Fish plate design -6.jpg
Views: 151
Size:  68.9 KB

Name:  Fish plate design -7.jpg
Views: 145
Size:  59.9 KB
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Kitsbeach (Ken)

1967 C10 LWB (now SWB) Fleetside 6cyl Saginaw three-on-the-tree "No Frills"

1980 C20 Long to short & static drop "Square One"
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Old 07-29-2024, 01:03 AM   #7
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Left side fish plate

Just realized I have no pictures of the actual frame welding and grinding but here are a couple of the left side fish plate skip welded in place:

Name:  Welded fish plate left side -1.jpg
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Name:  Welded fish plate left side -2.jpg
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Size:  51.9 KB
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Kitsbeach (Ken)

1967 C10 LWB (now SWB) Fleetside 6cyl Saginaw three-on-the-tree "No Frills"

1980 C20 Long to short & static drop "Square One"
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