Ask him if he can include the ABS and traction control from a 996 as well. You’re going to need it. You’re going to end up with more rear bias than a 911.
Seriously, I’d invest in a Porsche Experience so you can size up the difference between high powered mid-engines vs rear engines Porsches before you invest that kind of money in what will no doubt be a stunning car.
That is, unless you’re familiar with the issues. In that case, “Never mind.”