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This is the real challenge I’ve always known was coming, but haven’t mentioned or tried to think about until I had to tackle it. Some of you probably knew it was going to happen also, but chose not to mention it.
Basically, what it comes down to is that the engine intake plumbing and p-pump sit right in the middle of where the hydroboost and brake master cylinder need to go.
The brake pedal and steering column are all held together with common parts and fasteners underneath the dashboard. Those parts also help tie the dashboard into the firewall. My goal is to make everything fit and still leave everything in their stock locations inside the cab, while moving the hydroboost and master cylinder outboard.
You can see the brake pushrod hole in the firewall is directly behind the intake. The right side of the blue tape on the firewall represents the side of the battery, if I have it snugged right up against the hood hinge with minimum clearance. The left side of the tape is one inch of clearance from the battery.
This is how much room there is front to back
Here's all the pieces that need to fit to have a working brake system.
I think I got really lucky in coming up with a simple and elegant fix. As mentioned before, I've had three cabs during the build of this truck. As I've worked I collected spare parts off of them. I'll use the pedal assembly on the right for my brake pedal. The plan is to press the push rod connecting shaft out of the pedal on the left and move it over to the left side of the pedal on the right. That will move the push rod attaching point approximately 4" outboard. Then I'll make the appropriate holes in the firewall to mount the hydroboost. That should place it perfectly between the engine and the battery.