The brackets were simply a bit if sturdy bar with a small bolts welded to the ends to stop the lifting cord from sliding off.
On the other end, I welded cut down rotoflex bolts which are a good fit into the sill plate jacking point holes. But on one, the bolt sheared off, so would suggest using same size but a stronger material.
For the jack 'head' I again used a cut down rotoflex bolt as it's use is more a locator. The base beneath it (round bar) supports the weight is a diameter of maybe 1" (I would have to check). It's also maybe about 2.5" to 3" long to avoid contacting the sill and bottom flange when attached to the jack.
I'll check the measurements tomorrow and advise if wrong.
I took the body off on my own using the pulleys and if you take your time to raise and lower equally, I found it to be a good method.
Kev.