[1952]

HI
Just installed the firewall booster .
instructions show to use a 2.5inch hole saw but the diagram shows a 2 inch hole
Use the 2.5 inch holesaw
check and double check your measurments
went in really nice
stock seat is perfect as well you can adjust pedal height and the the unit has brake light switch mount as well as steering column mount built into it
I was impresssed with the quality
Like you I did not want holes in the floor