If the booster was simply flat on the the firewall, that would go a long way, but (at least with this booster) the diameter of the booster and the clutch master cylinder occupy the same real estate on the firewall. One would need to scoot over a little to have both mounted flush.
The motor is already pushed to the passenger side as far as possible - the split case is up against the frame, and the drivetrain would be way out of square if we push it over any further.
We have a few ideas brewing, but need to get the motor in for good to see what kind of room we have to work with.
Next week’s plan is to have the drivetrain sitting on heavy tack welds and make the truck a roller again.