NO NO NO...I disagree with the above posters...

You're on the right track...You can bolt the entire spindal assembly to the lower control arms, brake and all. Then bolt the upper control arms to the car...

One major mistake that I've seen that you've made so far is the absence of the transmission cooling lines...

You can continue with all the wiring harnesses, transmission crossmember, heater hoses, upper rad hose, pos battery cable, etc... as well

Great job, keep up the great work, and I can assure you that you'll never put an engine in through the top EVER again.

I've been doing it that way for 15+ years with dozens of cars...you'll be amazed at how you can install your complete engine/trans/suspension/brakes in 20 minutes