You have to modify the Vr booster firewall bracket and it fits OK
1st picture is the Vr & Vt booster side by side, the Vr has the extension bracket which has to be modified to fit the Vt. From the front face of the bracket to the rod hole center is 114mm on the Vr.
2nd picture the booster bolt pattern
3rd picture I fabricated a base to fit the Vt booster and with a shortened and slightly reshaped Vr bracket setup the Vt booster position.
The bracket was placed in position in the car and the booster aligned next to the strut tower, the rod length was checked to the pedal pin and a new support bracket was made for the strut tower to hold the master cylinder.
Then the bracket was scribed top and bottom and taken out again and the final weld was done.
NOTE:- The bracket is NOT square to the firewall, it is angled slightly towards the engine,
I found the original Vr setup was this way as well.
4th picture Vt booster and master cylinder ready to bolt on and maintaining the 114mm from the bracket to the rod hole center.
5th picture the Booster/Master Cylinder installed, please note it sits lower than the original Vr combo as I paid particular attension to getting the alignment as close as possible to a straight line from the brake pedal rod pin to the strut tower bracket and centered on the firewall hole.