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Small Block & Big Block Engine Bore & Stroke Charts

Small Block & Big Block Engine Bore & Stroke Charts

Our comprehensive charts are an essential resource for enthusiasts and professionals interested in the technical details of small-block and big-block engines. This detailed guide includes specifications for various engines across different years, covering:

  • Bore Diameter: Measurement of the cylinder bore.
  • Stroke: Length of the piston travel in the cylinder.
  • Rod Length: Length of the connecting rods.
  • Main Bearing Diameter: Size of the main bearings.
  • Rod Bearing Diameter: Size of the rod bearings.
  • Main Caps: Information on the main bearing caps.
  • Journal Size: Size of the crankshaft journals.

Each model is listed with specific measurements, providing a comprehensive overview for modifications, rebuilds, or general knowledge.

Small Block Engine Bore & Stroke Chart

Engine Years Bore Diameter Stroke Rod Length Main Bearing Diameter Rod Bearing Diameter Main Caps Journal Size Notes
wdt_ID wdt_created_by wdt_created_at wdt_last_edited_by wdt_last_edited_at Engine Years Bore Diameter Stroke Rod Length Main Bearing Diameter Rod Bearing Diameter Main Caps Journal Size Notes
1 dinobehlerjr 01.30.2024 08:53 PM dinobehlerjr 01.30.2024 08:53 PM 262 1975 - 1976 3.67 3.10 5.70 2.45 2.10 2-bolt Medium
2 dinobehlerjr 01.30.2024 08:53 PM dinobehlerjr 01.30.2024 08:53 PM 265 1955 - 1956 3.75 3.00 5.70 2.30 2.10 2-bolt Small
3 dinobehlerjr 01.30.2024 08:53 PM dinobehlerjr 01.30.2024 08:53 PM 265 1994 3.74 3.00 5.70 2.45 2.10 2-bolt Medium
4 dinobehlerjr 01.30.2024 08:53 PM dinobehlerjr 01.30.2024 08:53 PM 267 1979 - 1981 3.50 3.48 5.70 2.45 2.10 2-bolt Medium
5 dinobehlerjr 01.30.2024 08:53 PM dinobehlerjr 01.30.2024 08:53 PM 283 1957 - 1997 3.88 3.00 5.70 2.30 2.00 2-bolt Small
6 dinobehlerjr 01.30.2024 08:53 PM dinobehlerjr 01.30.2024 08:53 PM 293 1999 3.78 3.27 5.70 2.30 2.10 2-bolt Medium "LR4" 4.8 Liter Vortec
7 dinobehlerjr 01.30.2024 08:53 PM dinobehlerjr 01.30.2024 08:53 PM 302 1967 4.00 3.00 5.70 2.30 2.00 2-bolt Small
8 dinobehlerjr 01.30.2024 08:53 PM dinobehlerjr 01.30.2024 08:53 PM 302 1968 - 1969 4.00 3.00 5.70 2.45 2.10 4-bolt Medium
9 dinobehlerjr 01.30.2024 08:53 PM dinobehlerjr 01.30.2024 08:53 PM 305 1986 - 1997 3.74 3.48 5.70 2.45 2.10 2-bolt Medium 1-piece
10 dinobehlerjr 01.30.2024 08:53 PM dinobehlerjr 01.30.2024 08:53 PM 305 1976 - 1986 3.74 3.48 5.70 2.45 2.10 2-bolt Medium 2-piece
11 dinobehlerjr 01.30.2024 08:53 PM dinobehlerjr 01.30.2024 08:53 PM 307 1968 - 1973 3.88 3.25 5.70 2.45 2.10 2-bolt Medium
12 dinobehlerjr 01.30.2024 08:53 PM dinobehlerjr 01.30.2024 08:53 PM 325 1999 3.78 3.62 5.70 2.45 2.10 2-bolt Medium "LM7" 5.3 Liter Vortec
13 dinobehlerjr 01.30.2024 08:53 PM dinobehlerjr 01.30.2024 08:53 PM 327 1962 - 1967 4.00 3.25 5.70 2.30 2.00 2-bolt Small
14 dinobehlerjr 01.30.2024 08:53 PM dinobehlerjr 01.30.2024 08:53 PM 327 1968 - 1969 4.00 3.25 5.70 2.45 2.10 2-bolt Medium
15 dinobehlerjr 01.30.2024 08:53 PM dinobehlerjr 01.30.2024 08:53 PM 350 1967 - 1985 4.00 3.48 5.70 2.45 2.10 2-bolt/4-bolt Medium 2-piece
16 dinobehlerjr 01.30.2024 08:53 PM dinobehlerjr 01.30.2024 08:53 PM 350 1986 - 1995 4.00 3.48 5.70 2.45 2.10 2-bolt/4-bolt Medium 1-piece
17 dinobehlerjr 01.30.2024 08:53 PM dinobehlerjr 01.30.2024 08:53 PM TBI Injection
18 dinobehlerjr 01.30.2024 08:53 PM dinobehlerjr 01.30.2024 08:53 PM 350 1996 - 2000 4.00 3.48 5.70 2.45 2.10 Medium Vortec 350
19 dinobehlerjr 01.30.2024 08:53 PM dinobehlerjr 01.30.2024 08:53 PM 350 1989 1995 3.90 3.66 5.74 2.45 2.10 4-bolt Medium "LT5" in ZR-1 Corvette 32 Valve DOHC
20 dinobehlerjr 01.30.2024 08:53 PM dinobehlerjr 01.30.2024 08:53 PM 350 1997 3.90 3.62 6.10 2.45 2.10 4-bolt Medium Gen 3 "LS1" makes 346 cubic inch
21 dinobehlerjr 01.30.2024 08:53 PM dinobehlerjr 01.30.2024 08:53 PM 364 1999 4.00 3.62 5.70 2.45 2.10 4-bolt Medium "LQ4" 6.0 Liter Vortec
22 dinobehlerjr 01.30.2024 08:53 PM dinobehlerjr 01.30.2024 08:53 PM 377 400 Block 4.16 3.40 5.70 2.45 2.10 2-bolt/4-bolt Medium Must Use Main Bearing Spacer
23 dinobehlerjr 01.30.2024 08:53 PM dinobehlerjr 01.30.2024 08:53 PM 383 350 Block 4.03 3.75 5.57 2.45 2.10 2-bolt/4-bolt Medium 400 Mains Cut to 350 Size
24 dinobehlerjr 01.30.2024 08:53 PM dinobehlerjr 01.30.2024 08:53 PM 400 1970 - 1972 4.13 3.75 5.57 2.65 2.10 4-bolt Large
25 dinobehlerjr 01.30.2024 08:53 PM dinobehlerjr 01.30.2024 08:53 PM 400 1973 - 1980 4.13 3.75 5.57 2.65 2.10 2-bolt Large

Big Block Engine Bore & Stroke Chart

Engine Years Bore Diameter Stroke Rod Length Main Bearing Diameter Rod Bearing Diameter Main Caps Journal Size Notes
wdt_ID wdt_created_by wdt_created_at wdt_last_edited_by wdt_last_edited_at Engine Years Bore Diameter Stroke Rod Length Main Bearing Diameter Rod Bearing Diameter Main Caps Journal Size Notes
1 dinobehlerjr 01.30.2024 09:03 PM dinobehlerjr 01.30.2024 09:03 PM 366T 1968 - 1990 3.94 3.76 6.14 2.7495 -  2.7488 2.20 4-bolt Standard
2 dinobehlerjr 01.30.2024 09:03 PM dinobehlerjr 01.30.2024 09:03 PM 396 1965 - 1969 4.10 3.76 6.14 2.7495 - 2.7488 2.20 2-bolt/4-bolt Standard
3 dinobehlerjr 01.30.2024 09:03 PM dinobehlerjr 01.30.2024 09:03 PM 402 1970 - 1972 4.13 3.76 6.14 2.7495 - 2.7488 2.20 2-bolt/4-bolt Standard
4 dinobehlerjr 01.30.2024 09:03 PM dinobehlerjr 01.30.2024 09:03 PM 427 1969 4.25 3.76 6.14 2.7495 - 2.7488 2.20 2-bolt/4-bolt Standard
5 dinobehlerjr 01.30.2024 09:03 PM dinobehlerjr 01.30.2024 09:03 PM 427T 1968 - 1985 4.25 3.76 6.14 2.7495 - 2.7488 2.20 2-bolt/4-bolt Standard Tall Deck
6 dinobehlerjr 01.30.2024 09:03 PM dinobehlerjr 01.30.2024 09:03 PM 454 1970 - 1990 4.25 4.00 6.14 2.7495 - 2.7488 2.20 2-bolt/4-bolt Standard
7 dinobehlerjr 01.30.2024 09:03 PM dinobehlerjr 01.30.2024 09:03 PM 454 1990 -up 4.25 4.00 6.14 2.7495 - 2.7488 2.20 2-bolt/4-bolt Standard
8 dinobehlerjr 01.30.2024 09:03 PM dinobehlerjr 01.30.2024 09:03 PM 502 1996 -up 4.45 4.00 6.14 2.7495 - 2.7488 2.20 4-bolt Standard