• Mustang Forums
  • 1965 - 1973 Classic Mustangs -General/Talk-
  • Classic Mustang Specific Tech

'69 Front Floor Support Install

  • Thread starter Thread starter JeremiahJohnson
  • Start date Start date May 5, 2014
J

JeremiahJohnson

Member
Feb 28, 2014
22
1
14
Illinois
May 5, 2014
#1
  • May 5, 2014
  • #1
Hey Guys,

I'm working on installing new floor supports on my '69 sportsroof. I installed a complete dynacorn floor pan assembly which came with floor supports already welded on but, I cut them off because I thought they were in the wrong place. At the very least they were not parallel to each other. And so I have a new pair of floor supports held in place with self tapping screws at the moment in what I think is the right location. They are currently 30" apart center to center and centered between the rockers at the front of the support and rear of the supports. The dynacorn floor tends to narrow towards the front for whatever reason.

I realize that the floor support location side to side is relatively important considering they will dictate your front frame rail location and thus your wheel alignment. Can you guys give me any advice or ideas on how I can ensure I have the floor supports in just the right spot?

I'll try to post a picture soon of what I'm trying to describe.
 

horse sence

15 Year Member
Nov 29, 1999
12,178
7,998
233
Wile Coyote's stunt double
May 5, 2014
#2
  • May 5, 2014
  • #2
The width between the floor supports, inside face to inside face is 27 1/2 inches .
From the outside edge of the rocker lip is 11 inches to the face of the floor support .
both sides measure the same .
 
Last edited: May 5, 2014
J

JeremiahJohnson

Member
Feb 28, 2014
22
1
14
Illinois
May 6, 2014
#3
  • May 6, 2014
  • #3
Thank you for checking on that for me. My measurements seem to be about the same as yours, though my rockers seem to be about a half inch wider than yours for whatever reason.

I feel like I am worrying too much about getting these supports in just the right place. As long as I do the best I can with a tape measure, that should be good enough, huh?
 

horse sence

15 Year Member
Nov 29, 1999
12,178
7,998
233
Wile Coyote's stunt double
May 6, 2014
#4
  • May 6, 2014
  • #4
I think as long as you have equal spacing on each side you will be fine .you do not want to be any less than 11 inches at the out side or the torque boxes will not go in
 
J

JeremiahJohnson

Member
Feb 28, 2014
22
1
14
Illinois
May 7, 2014
#5
  • May 7, 2014
  • #5
Thanks for all your help Jim. I really appreciate it.
 
You must log in or register to reply here.

Similar threads

K
TKX Transmission Shifting Problem
  • KWC156
  • Jun 23, 2025
  • Other Auto Tech
  • 2
Replies
21
Views
2K
Other Auto Tech Yesterday at 3:39 PM
427nostang
4
Electrical Innovate PSB-1 is DOA? Am I an idiot? All plausable. Please Help
  • Dontknowchit
  • Apr 26, 2025
  • Fox 5.0 Mustang Tech
Replies
1
Views
396
Fox 5.0 Mustang Tech Apr 26, 2025
Dontknowchit
3
Eight inches is enough for me...
  • 351MooseStang
  • Nov 27, 2025
  • 1974 - 1978 Mustang II Talk & Tech
Replies
5
Views
502
1974 - 1978 Mustang II Talk & Tech Mar 2, 2026
Bullitt347
M
Progress Thread mnky99 2001 V6 evap core, ac compressor, heater core replacement
  • mnky99
  • Sep 5, 2025
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
1
Views
425
1996 - 2004 SN95 Mustang -General/Talk- Sep 5, 2025
mnky99
M
Tightening upper control arm bushings at ride height dilemma… need some help
  • AnthonyA1234
  • Dec 27, 2024
  • Fox 5.0 Mustang Tech
  • 2 3
Replies
51
Views
5K
Fox 5.0 Mustang Tech Feb 27, 2025
General karthief
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1965 - 1973 Classic Mustangs -General/Talk-
  • Classic Mustang Specific Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?