Overdrive solution?

If you had to a GM product I think the 200 r4 is the better choice, when properly built. The ratios are spread a little more evenly than the 700 r4
________1___2___3___4
200 R4 2.74 1.57 1.00 .67

700 R4 3.06 1.62 1.00 .70

And just for comparison, here are the Chrylser o/d autos

A500 2.74 1.54 1.00 .69

A518 2.45 1.45 1.00 .69

Notice that the 200 R4 and the A500 have almost identical ratios, in which case why not use the mopar version?