Unless you've also done an install, his is higher than yours. I've done it, my experience level is high as is plainly evident in my posts. Your comment about the shop working on your car tells me you've never dealt with a tuner shop, the fact that you think they are working on your car and your car alone from the time they have it till its delivered back to you; that's inexperience talking.
The fact that you think this is a simple 8 hour "got it done" no issues straight forward install suggests to me that you've not done it, matter of fact, your comments suggest to me that you've done a lot of "forum reading" but little major wrench turning, IE pulled heads, cam installs, pulled the engine, diffs, trans etc. Now, one could say the same about me but...
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Intake swap
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Head swap
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Trans upgrade and installed trans/diff strengthening braces
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Engine out of the car and delivered to HPR and as you can see in the 1st and 2nd pics, that in my garage using this quick jack
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So yeah, I have a bit of experience and you're not installing a super charger in 8 hours