diablo 6.0 tire calculations?

After extensive searching logical solution for 2001 6.0?
OEM tire size
235 35 18 front 235 x .35 = 82.25mm section height
82.25 x 2 =164.50mm combined section height
164.50 + 457.20(18") = 621.70mm overall diameter

335 30 18 rear 335 x .30 = 100.50mm section height
100.50 x 2 = 201mm combined section height
201 + 457.20(18") = 658.20mm overall diameter

Difference front to rear 621.70/ 658.20 = .94 (<1)

The Pzero Rosso "Red pzero" has the proper rear tire 335 30 18. The front tire that seems logical is the

245 35 18 front 245 x .35 = 85.75mm section height
85.75 x 2 = 171.50mm combined section height
171.50 + 457.20(18") = 628.70mm overall diameter

P Rosso front to rear difference 628.70/ 658.20 = .96 (<1)

Then is it safe to assume the new tire size will work? Are
there any other extenuating circumstances?
Kurt