Question about non OD 833 and rpm range

Sounds right to me. 440 4spd 354 dana 275/60 x15 tires 3000@60mph. In my area on country roads i4 spds are perfect. OD transmissions eliminate 3rd. which is needed on our roads. They actually go 1st-2nd-4th-OD. OD for economy, 4spd for performance. Passion 4spd with OD for both in one trans.