frame strengtheners

[72mustang67gto]

Need some advice, I have a 72 convertible with 351c that is being bored and stroked to 393, This has not ran yet, still in restoration phase.do you think I need to strengthen the frame up and if so do they sell a kit?

 

[73pony]

Yes. Especially a vert. Called subframe connectors. They are available from a couple different places.

 

[will e]

Yes, on a covertible, even if you don't kick up the horse power I always recommend subframe connctors. If you click on 'my garage' in my sig you can see a photo of some on my mustang.

 

[Carolina_Mountain_Mustangs]

If you really want to beef it up put in a 6 point roll cage. Will add many times more than the sub frame can. Frame connector are more or less a straight line no triangulation to strengthen. Yes there is some but not much. You will need to weld in some thicker sections to the rocker boxes and also the rear floor but you will reduce the twist substantially and not too expensive. Probably someone makes a kit for it. Single cross over loop bar, bar to front of rocker box, bar to rear and a cross bar for attaching shoulder harness also.

If you ever roll in a vert there is noting but cloth between your head and the road. That windshield will fold like a piece of paper.

 

[MaddMike]

I know there are subframe connectors available for 71-73 fastbacks. But can anyone recommend what manufacturers are better than others?

 

[vintageman]

I have the Global West subframe connectors for fastbacks but cannot say how good they are because I haven't had the chance to install them yet. I will say that they look very well made and the weld on them are good and look to be strong. I did mock them up into place and they lined up and fit very well also. If needed, I would buy them again. Good luck in your search and with your project.

Tom

 

[MaddMike]

I have the Global West subframe connectors for fastbacks but cannot say how good they are because I haven't had the chance to install them yet. I will say that they look very well made and the weld on them are good and look to be strong. I did mock them up into place and they lined up and fit very well also. If needed, I would buy them again. Good luck in your search and with your project.

Tom

Thanks. I am torn between the Global West unit and the standard box frame pieces.

 

[Omie01]

I have the Global West as well, they are great! But that being said, the round tubes look a little out of place. If I had to do it again, I might look at the box ones as they wouldn't look so foreign. Good Luck!!

 

[Otto]

I went with tinman fabrication. They hug the floorboards nicely and are rectangular, so they don't look out of place under the car. More importantly, they stiffened the main part of the chassis significantly.