Colorado Ratios:
3.75
2.26
1.37
1.00
0.73
3.67 (reverse)

The Supra trans will also bolt to the colorado bellhousing. The ratios are better, but you give up the triple cone synchros.
Supra ratios:
First Gear: 3.250:1
Second Gear: 1.955:1
Third Gear: 1.310:1
Fourth Gear: 1.00:1
Fifth Gear: 0.753:1