Agree with all on waiting on the engine. As said above I got mine about 5 months after the frame was delivered.

Once you decide on your power plant check with them on details of fuel inlet location. This will let you lay out your fuel lines and if you need a tank pump, external pump or a block mounted pump. Return lines if going fuel injection.

I was going down a path of running fuel lines down the drivers side thinking the motor had a block mounted fuel pump and found out once digging into the details with the engine supplier they supplied a Holley electric fuel pump so I ended up running the fuel lines down the passenger side eliminating the crossover.