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Heavy Duty frame rails and connectors

frame rails

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#1 toolman

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Posted A week ago

Orginially I was thought I could get away with repairing the frame rails.  But after cutting open the frame rails, corrosion made them unrepairable.   So rail replacement was  necessary.    After checking out the replacement floor pans and frame rails available, I decided to construct my own.   Normally one can get away without bracing the body to do the replacement.  But I

found some corrosion on the front of driver side rocket panel.   Could not determine how strong the rockers were without cutting them open.  I constructed body bracing inside the car just above the floor pan.   The bracing was mounted to the two lower door hinges mounts.  The outer seat belt mounts were used for the other side of the body brace.  1" square steel tubing was used in a crossing pattern to provide support for the floor pan.  I want to make it bolted in instead of just welding it .Construction took about

two days with all the fitting that necessary.

P1030413
  floor panel corossion
P1030416
   pics of removed rusted areas
P1030406
   lower door hinge mount
P1030403
    top view of the body bracing above the floor pan
P1030399
    close up view of door hinge mount
P1030396
   picture of repaired crack in rear transmission tunnel
P1030388
   frame rail rust

 

 

 

 

 

 

 

 



#2 grannyknot

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Posted A week ago

I guess shipping is the real killer when bringing in stuff to the islands?  I would just warn you to only do one side at a time then just do the floor pan then when that is completed do the rocker, you could also bolt up the transmission mount to add a bit more stability.

Are you going to extend the floor pan rail so that it connects up with the sub frame in the back? Like the rail extensions that BadDog sells.



#3 toolman

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Posted A week ago

Shipping stuff here is a killer!!   Replacement floor set (both sides) without the rail upgrade shipped here by Post was over $400.   I still plan to do only one side floor panel at a time even with the body brace.   You never know if you might need some additional measurements.   Can't get it if you cut up both sides.

My old transmission mount was removed when I first put Chevy 327 with Turbo 400 about 1974 or so.   I do plan to connect the front frame rails to the rear

ones.   I will beef up the front side of the rear frame rails as I was thinking about putting a whole independent suspension and narrow it.   But for now, I'll

leave the R200 differential in.  Also. I plan to upgrade the front frame rails for the LS3 motor.

                                                                                                                        Sunny

floor panel cutout 2
floor panel cutout


#4 toolman

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Posted A week ago

Found additional rust in front left side rocket panel.   So I constructed additional bracing for the engine compartment.   The bracing of 1" x 1" steel square tubing connects the firewall with the two strut towers.  The bracing is necessary if corrosion is found in the engine compartment frame rails. 

                                                                                                        Sunny

P1030420
  rocker panel rust
P1030425
  firewall bracing
P1030423
  firewall bracing
floor panel cutout
  floor pan cutout

 

 

 

 







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