No, No, No...You got that all wrong.. :shock:
What you want is....
AP build--6" front rims with 6X6"rear rims
6" front rims with 13X5.5X6 tires
6" rear rims with 13X6.5X6 tires
20 HP, Built from an 8hp block....
:twisted:
The rest of the gearing and such looks OK... :wink: