48 for sure. 60 just doesn't fit that well and 48 will do everything you need it to do.
Size does matter, but bigger ain't neccesarily better in this case. Unless, of course, you WANT people to comment on and gawk at the size of your tool.
'89 Islander 4.2l 5 speed
'14 Grand Cherokee Limited 3.6
One Jeep is Never Enough