Welcome along. As i've just said in your other thread, i reckon 60mm should do you just fine, thats where mine is, and its low enough without being uncomfortable or scraping too much. If you're doing the torsion bar, i would also recommend plenty of penetrating fluid, a slide hammer with decent high tensile bolts, and a BFO hammer for if that fails. 
Oh yeah, and a good set of lungs, you'll probably end up shouting at it a lot....it really does help!
Oh yeah, and a good set of lungs, you'll probably end up shouting at it a lot....it really does help!
![[Image: P1060836_zpsz3xgxt7q.jpg]](http://i1101.photobucket.com/albums/g427/wingnutz2/P1060836_zpsz3xgxt7q.jpg)