Jerry, I'm looking at a simple hoop with 2 90's. CLR around 6". Height would be high enough for head protection (slightly over headrest height), but low enough for top clearance. Due to a frame kick up, overall height of the bar itself will only be about 36-40". I will also add a cross bar for possible future harness attachment.

I'm going to have to add some small wheel tubs for tire clearance, so overall width will only be around 31".