I had dutchman narrow my 60, then I put a 70 ring and pinion in it....for about $1K, it was 185 to narrow and 500 for shafts, the rest of the parts were $300ish

1941 Taylorcraft
1968 Charger
1994 Wrangler
1998 Wrangler
2008 Kia Rio
2017 Jetta

I didn't do 4 years and 9 months of Graduate School to be called Mister!