rear end dimension? MINI TUBBED 69

[fjb2069]

Hoping someone can help me verify rear end dimension.

BS 5" with tires.

tire width 12.5"

Tire diameter 26.4"

With dimension between wheels set to 53.125" leaves about 0.9" of clearance between inner wheel well and tire.

My main question is if .9" is enough at ride height?

When tires are jacked to the highest position in tubs (about 2.5" of travel from desired ride height) there is about .75" of clearance between outer wheel well and tire. At ride height there is about 1.5" of clearance on outer well. Due to the shape of the outer well I am centering the tire in tubs at highest point, not ride height. comments?