Sounds like you should be fine I wouldn’t second guess your work. I had the same concerns with mine on the passenger side, ended up overtightening it n twisting the clamp. Even then it still sealed fine no leaks. In any case, on the driver side I force my hand between the booster and fuel lines and under the master cylinder. I use a 1/4” drive ratchet w/o extensions and hand it to myself from above.