Your car has a 4.4 final, the xfi had 3.8 that is a big jump. The 95+ four cylinder stick Metros had the 3.8 ratio also. I would get a 4.1 out of an 89-94 three cylinder car. I bought a reground cam and 10 degree advanced cam gear when I assembled an xfi clone. It was from 3tech in Canada. They might still be around. Check on the Geometroforum.com.
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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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