Has nobody considered what would happen here if this all worked and you got into the job role?
The people who managed a 2:2 or a 2:1 on my course at my uni, as lovely as they all are, just wouldn't hack it. Honestly, it just wouldn't happen. I can tell you that with confidence because I used to teach my peers in workshops and tutorials and I know their learning styles and what we could all do.
The harsh reality of the current grading system is that candidates with firsts and 2:1's have shown they are able. If you got a low 2:2 in Engineering, say, ****ed about for 3 years, didn't bother in your modules, and then went for a job as an engineer for BP or whatever on their high flyer graduate program, where everyone else has a first from top 10 unis... do you really think you'd be okay with it and you'd handle the workload?
Seriously, being dishonest in an interview can land you in **** later. Go in, be true to yourself and be proud of what you've done. Show them what you're made of, and sell yourself as you are. That's the key to an interview, and then a successful career... not just creating lies.