Bolt pattern for WHAT???????
The 400 tranny on a 1983 Chevy 6.2L K20 diesel have very high pressure.
5x5
4x100
1983 Chevrolet S-10 Pickup Bolt Pattern: 5x120.65. Center Bore: 70.3. Hardware:12x1.50 Lug Offset: 00-20mm
Bolt pattern for most rwd chevys is 5 x 4.75. Camaros, Novas, Monte Carlos and so on.
There are a number of trucks that have a 5 on 5.5 bolt pattern. From Dodge alone, these include the Durango (from 2004 on), the Dakota (from 2005 on), and the Ram Charger (from 1979 to 1983). The Kia Sorrento from 2003 on also has this bolt pattern.
5 X 4 3/4
14 or 15 inch lug pattern is 5 on 4.5
what bond is k20
5x4.75 or 5x4 3/4 same thing
Most likely its a Corporate 10 bolt front, and 14 bolt rear. Prior to 77 the front axle would have been a Dana 44.