I am swapping in a 700r4 tranny and am not using a lift. I am going to jack the car high off the floor. I have seen these transmission jack adaptors. Has anyone had any experiences with these adapters? Pros and cons? Will they fit a 700r4 tranny? Which brands are the good ones and what do they usually run? Sorry for all the questions just dont want to get a hunk of junk or something that isnt going to work good. Any comments would be greatly appreciated.