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Username Post: 37-38-39-front suspension/rear diff Frame's Centerline?        (Topic#366985)
G-T 
Newbie
Posts: 3

Reg: 11-18-21
11-18-21 04:14 PM - Post#2831069    

I am building a modified 1938 2 dr Coach Deluxe with 112 1/4" wheelbase, is there someone to help me find the exact front suspension's and rear Diff-axle's centerline on a stock frame?I have a bare frame without any components attached to it, a Mustang II front subframe that I need to centered, and a jobber universal rear four-link that I also need to properly center.Both without any installation procedure informations,Thanks



 


Keith_Knox 
Member #189 Moderator and "19th Year" Platinum Supporting Member
Posts: 6799
Keith_Knox
Age: 80
Loc: Napa, Ca USA
Reg: 04-02-00
11-18-21 07:31 PM - Post#2831081    
    In response to G-T

Welcome to ChevyTalk. Measurements should be here.
https://www.gmheritagecenter.com/docs/gm-heritage-...

29-41, 42-48, 49-54 Moderator
1948 Chevy Fleetmaster Coupe Purchased 6/2010. Stock with rebuilt 52 216 installed May 1966.
1965 Chevy II 2 door post 350 3 speed manual
2019 Ford Ranger Lariat Super Crewcab


 
G-T 
Newbie
Posts: 3

Reg: 11-18-21
11-19-21 07:19 AM - Post#2831108    
    In response to Keith_Knox

Thanks Keith but beside giving the 112 1/4" wheelbase measure, that 1938 GM document doesn't help much. I need to know "where" on frame rails that wheelbase centerline is, my new wheel spindles, a-arms and Mustang center beam and also my new rear diff all need to be installed exactly center lined from where the original components where.I was hoping someone who already install a mustang II front suspension would have precise information on that matter; Cheers



 
Mercedes 
Contributor
Posts: 539

Reg: 07-09-18
11-24-21 11:12 AM - Post#2831400    
    In response to G-T

With a frame of that age and era, I would not rely upon any frame markings to be the centerpoint. I would lay the frame on the floor and create measurements with a tape measure to find the "center" of the assembly.

You will have to decide what you are measuring when you lay this out. The frame rails may not be symmetric on each side so you might find yourself measuring from the outermost attachment points of the suspension.

Send over a few pics.



 
G-T 
Newbie
Posts: 3

Reg: 11-18-21
11-26-21 10:56 AM - Post#2831455    
    In response to Mercedes

I think you don't get it, I am a 65 years old body-shop so have you ever see a bare frame of that era before? Any frame have several factories punched holes made for holding or attaching different components to a frame, there are holes for body mounts, radiator mounts, suspension's and bumpers mounts ect ect, those holes could be used as a reference point to take measurements like in the case of a collision repair, or in my case here, someone with a 37-38 or 39 chev could measure from the center of anyone of those hole, example if you take the measure from one of the front body mounts center hole to the center of your front suspension's wheel's spindles centerline, this would be exactly what I need,Thanks



 
Mercedes 
Contributor
Posts: 539

Reg: 07-09-18
11-29-21 06:08 AM - Post#2831556    
    In response to G-T

I do understand and apologize if you are unhappy with my advice.

Knowing the age of the item, my advice was to measure and find the center since there might be a twist, bend or other manufacturing exception that would make the "centerline" different from the actual center of the mass.



 


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