front speakers in a 69 camaro

[sonic69]

I'm having a whole custom stereo set up put in my 69 Camaro. They have all the amps and rear speakers in, but are trying to figure out the front. They are afraid if they cut into the kick panel below the vent pulls there won't be enough depth to get the speaker to set in. Has anyone done this or do you have any ideas of what to do. Thanks