F1 and F3 Frames
Marmon-Herrington Man
Joined: Jul 2005
Posts: 11,986
Likes: 446
From: Central Illinois
Like Penn Dick said, longer wheelbase at 122" for F-2/F-3 vs. 114" for F-1. The F-1 rails measure 5.92" tall x 2.25" wide x 0.15" thick. The F-2/F-3 are 6.00" x 2.25" x 0.19". The F-2/F-3 also have a bigger transmission cross member. The F-1 has four cross members while the F-2/F-3 has six. Stu
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New User
Joined: Jan 2010
Posts: 22
Likes: 0
From: Ontario Canada
Thanks for the quick answers.It helps alot! The front of my F1 frame has been cut and also bent by the PO (forward of the engine cross member), I was thinking of welding in a section of an available F3 frame. Any thoughts?
RRHD
RRHD
Cargo Master
Joined: Apr 2009
Posts: 3,038
Likes: 4
From: South west Idaho
I would check the f-3 frame to see if it was square and not twisted. Then shorten it to fit the cab and box to .If the f-1 frame has been cut off in front it may have been wrecked and damaged out of square. It may be less work to use the f-3 frame. It's been done a number of times here, maybe one of the members that have done it will help guide you.
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New User
Joined: Jan 2010
Posts: 22
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From: Ontario Canada
Thanks Jim, the F3 frame is not complete it has been cut off (why I don't know) just aft of the engine mount. I have only seen pictures, look straight. Thought I could cut off what I need and weld it on? going to be a daily driver not a show truck.
RRHD
RRHD
Cargo Master
Joined: Apr 2009
Posts: 3,038
Likes: 4
From: South west Idaho
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Post Fiend
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