SM465 install question

[Myoldtruck]

Im in the process of changing over from a 3 speed to a 4speed (sm465). I have a 2wd long bed. I cut out the floor pan for the high hump.

I need some input on how to get this heavy trans lifted up and installed into the bell housing. Im doing this in the garage.

So far I installed a wood 2x4 across the dash going thru both vent windows. Installed a come-a-long to the 2x4. Installed lift chains on top of the trans. Im able to lift the trans to a certain point up into the tunnel, and used my floor jack under the trans.

I just need some more input to get the rest of the way there.