This is for my 37 Plymouth. I want to change the master cylinder from the original single to a dual master. Here is my question. Can I fabricate a mount and weld it to the bottom of the master cylinder and it be safe to use? Let me explain. I have a Mustang cylinder, that I have welded a mount to the bottom of it. It is made of 1/4 inch steel flat plate. My plan is to mount it to the original mounting bracket, so I can keep the original location of the floor pedals. I don't want swing pedals. I can't mount it any other place account of the exhaust being in the way. Like mounting it in reverse in the frame. I have welded the bracket to the housing and have tried to break it of with several blows from my trusty hammer. But it will not come off. I have hammered it to the point that I thought I was going to break the master cylinder itself.
I do know that they have finally manufactured on for my car, but it's still the problem of where the exhaust rons through the frame. There is no other place to run the exhaust. So, how about some thoughts on this.

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Street is Neat! And Safety Inspections Keep It That Way!

I would try to find something other than the master to weld it to cause its cast.(maybe cut away some of the master and weld the plate to the frame of the car?Or bore a hole straight through??) We make our own mounts here in the shop and use the mustang or vette master. If your worried i would have a weldor look at it. Make sure the push rod can NOT fall out and use good heim joints to connect. Most guys now are putting the pedals under the floor to get the firewall smooth . Just did a 57 chev the other day
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Drive like you stole it !!

I know I would never weld anything to the cast iron of a master cylinder. You are asking for big trouble if
you do.
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Grump