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GM gear ratios are about 9% between ratios. So 18% is closest to 3.42 for your 7.5” rear end. That is a big jump, I played with gear ratios when I was running Geo Metros several years ago. I don’t know if 3:73 will be enough to be worth the trouble, that is entirely up to you. The 3:42 set might be 4th gear into a head wind with a 2.2. The V6 s10 probably has an 8.5” diff with 3:73 or 3:42. Driveshaft might be a different length with the 8.5”.
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02 Saturn L200 5 speed- 265k miles
84 Gmc 6.5 na diesel K30 4x4, TMU
2006 Lincoln Navigator, 215k miles
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