Chris,
One thing you should consider is getting a dolly for the chassis build. First it will put the work at a comfortable standing level and will allow you to get under it with ease. Mine is about 28 inches tall and has 5" urethane tired steel caster wheels on one end and fixed wheels on the other. It is made of steel tubing (mostly 1.5"x4" with 1.5" square as the uprights in the 4 corners.)
Having this will also allow you (alone) to swap ends if need to get one end or the other into the light. It will also let you roll it outside if you need a little more elbow room. This assumes you have a driveway and that it isn't too steep. Don't want it rolling away down the street

Seriously, I paid an extra $300 for it, and it was worth every penny!
If your garage floor and driveway is smooth enough, you can use the individual dollies that go under each tire, but they won't help you with the height and you'll need to be very careful of the expansion crack at the front of the slab since the wheels on these don't have a very large diameter.
I used a couple of 1.5 ton come-alongs to take it off: I pulled the car up a few inches and rolled the dolly out from under it and let it back down. To hang the come-alongs, I had a 4"x 24" lam-beam on the engine end with upright 4x4s on either side of the car to support it and two 2x10s bolted together, again with 4x4s for support, to lift the front of the car. These beams were tied into the garage structure so that they couldn't move laterally. I also used the lam-beam to install and remove the engine/trans (several times

and all of this was done by only 3 people: me, myself and I.
Regards,
Lynn
PS: I can do up a dimensional drawing of the dolly if you'd like. Here's a pic of the chassis on the dolly. You can't see much of the dolly as it was completely hidden under the car.