Can someone help with TTI headers and a 360 ?

These are not TTI but cheep $100 Jegs and here's how I put them in.
Put the headers on while the motor was on an engine stand. Lifted the motor off the stand with a hoist and lowered it onto the K frame sitting on a couple floor moving dollies. Then lifted the front of the car up high enough to roll the motor under. Then lowered the body down on to stands. then reached in and picked up the motor and K frame into place with a engine hoist. This way was much easier for me then when I added the headers to the car, or tried to remove the old engine leaving the headers in the engine bay. From the bottom is the way to go IMO.