Check out this list. Compare the small journal 327 to the 302, and 283. 302 = same bore, and journal as 327 (62-67) 283 = same stroke, and journal as 302
Bore and stroke combos for small block chevy Engine Year Engine Size Engine Bore Engine Stroke Main Journal Rod Journal Main Caps
1975/76 262 3.671 3.10 2.45 2.10 2 Bolt
1955/56 265 3.750 3.00 2.30 2.00 2 Bolt
1979/81 267 3.50 3.48 2.45 210 2 Bolt
1957/67 283 3.875 3.00 2.30 2.00 2 Bolt
1967 302 4.001 3.00 2.30 2.00 2 Bolt
1968/69 302 4.001 3.00 2.45 2.10 4 Bolt
1976/90 305 3.736 3.48 2.45 2.10 2 Bolt
1968/73 307 3.875 3.25 2.45 2.10 2 Bolt
1962/67 327 4.001 3.25 2.30 2.00 2 Bolt
1967/69 327 4.001 3.25 2.45 2.10 2 or 4 Bolt
1967/90 350 4.001 3.48 2.45 2.10 2 or 4 Bolt
1970/72 400 4.125 3.75 2.65 2.10 4 Bolt
1973/80 400 4.125 3.75 2.65 2.10 2 Bolt