I'm currently re-instating an integrated garage to its original purpose so I can tuck my Cali safely away at night. Started stripping it out today and it's looking like I'll have 2.1m of available height overall. Is that going to be enough for my 6.1 Coast? It seems promising.
There's an initial "ramp" where the gradient of the driveway continues up into the garage, then at about 1m in it levels off sharply to a constant, near horizontal pitch all the way to the back. I'm intending to drive in forwards, so I'm tempted to say I would not have any problems with the approach angle. Should be able to test it out in the next day or two.
My builder is of course offering to dig out the existing base and put in a new one.