Im stuck on what size to get.

[kleners]

Ok I am about to order the tires!!!
Im lost on which to get.

I have a 69 ss chevelle that is stripped and awaiting tires and rims to start back halfing the car.

I am going with COY's 20x14 that will be custom powder gunmetal center polished lip.
As for tires im looking at the Mickey Thompson sportsman S/R
But lost on two sizes
29X15.00R20LT this from what pics i can find looks alittle small (rubberband).
and 31x16.00R20LT Which looks the size i want.

But from the drawing mockup i did the 31 looks HUGE!! and the 29 looks perfect?

I am going Modern Prostreet the rear will no be lowered and will sit an inch about rim. anyone have any ideas on one or the other for my 69 chevelle?