Chevy bore and stroke (small block)
262 - 3.671" x 3.10" Gen. 1, 5.7" rod
265 - 3.750" x 3.00" '55-'57 Gen.1, 5.7" rod
265 - 3.750" x 3.00" '94-'96 Gen.2, 4.3 liter V-8 "L99", 5.94" rod
267 - 3.500" x 3.48" Gen.1, 5.7" rod
283 - 3.875" x 3.00" Gen.1, 5.7" rod
293 - 3.779" x 3.27" '99-later, Gen.3, "LR4" 4.8 Liter Vortec, 6.278" rod
302 - 4.000" x 3.00" Gen.1, 5.7" rod
305 - 3.736" x 3.48" Gen.1, 5.7" rod
307 - 3.875" x 3.25" Gen.1, 5.7" rod
325 - 3.779" x 3.622" '99-later, Gen.3, "LM7", "LS4 front wheel drive V-8" 5.3 Liter Vortec, 6.098" rod
327 - 4.000" x 3.25" Gen.1, 5.7" rod
345 - 3.893" x 3.622" '97-later, Gen.3, "LS1", 6.098" rod
350 - 4.000" x 3.48" Gen.1, 5.7" rod
350 - 4.000" x 3.48" '96-'01, Gen. 1, Vortec, 5.7" rod
350 - 3.900" x 3.66" '89-'95, "LT5", in "ZR1" Corvette 32-valve DOHC, 5.74" rod
364 - 4.000" x 3.622" '99-later, Gen.3, "LS2", "LQ4" 6.0 Liter Vortec, 6.098" rod
376 - 4.065" x 3.622" 2007-later, Gen. 4, "L92", Cadillac Escalade, GMC Yukon
383 - 4.000" x 3.80" '00, "HT 383", Gen.I truck crate motor, 5.7" rod
400 - 4.125" x 3.75" Gen.1, 5.565" rod
427 - 4.125" x 4.00" 2006 Gen.4, LS7 SBC, titanium rods
Two common, non-factory smallblock combinations:
377 - 4.155" x 3.48" (5.7" or 6.00" rod) 400 block and a 350 crank with "spacer" main bearings
383 - 4.030" x 3.75" (5.565" or 5.7" or 6.0" rod) 350 block and a 400 crank, main bearing crank journals cut to 350 size
262 - 3.671" x 3.10" Gen. 1, 5.7" rod
265 - 3.750" x 3.00" '55-'57 Gen.1, 5.7" rod
265 - 3.750" x 3.00" '94-'96 Gen.2, 4.3 liter V-8 "L99", 5.94" rod
267 - 3.500" x 3.48" Gen.1, 5.7" rod
283 - 3.875" x 3.00" Gen.1, 5.7" rod
293 - 3.779" x 3.27" '99-later, Gen.3, "LR4" 4.8 Liter Vortec, 6.278" rod
302 - 4.000" x 3.00" Gen.1, 5.7" rod
305 - 3.736" x 3.48" Gen.1, 5.7" rod
307 - 3.875" x 3.25" Gen.1, 5.7" rod
325 - 3.779" x 3.622" '99-later, Gen.3, "LM7", "LS4 front wheel drive V-8" 5.3 Liter Vortec, 6.098" rod
327 - 4.000" x 3.25" Gen.1, 5.7" rod
345 - 3.893" x 3.622" '97-later, Gen.3, "LS1", 6.098" rod
350 - 4.000" x 3.48" Gen.1, 5.7" rod
350 - 4.000" x 3.48" '96-'01, Gen. 1, Vortec, 5.7" rod
350 - 3.900" x 3.66" '89-'95, "LT5", in "ZR1" Corvette 32-valve DOHC, 5.74" rod
364 - 4.000" x 3.622" '99-later, Gen.3, "LS2", "LQ4" 6.0 Liter Vortec, 6.098" rod
376 - 4.065" x 3.622" 2007-later, Gen. 4, "L92", Cadillac Escalade, GMC Yukon
383 - 4.000" x 3.80" '00, "HT 383", Gen.I truck crate motor, 5.7" rod
400 - 4.125" x 3.75" Gen.1, 5.565" rod
427 - 4.125" x 4.00" 2006 Gen.4, LS7 SBC, titanium rods
Two common, non-factory smallblock combinations:
377 - 4.155" x 3.48" (5.7" or 6.00" rod) 400 block and a 350 crank with "spacer" main bearings
383 - 4.030" x 3.75" (5.565" or 5.7" or 6.0" rod) 350 block and a 400 crank, main bearing crank journals cut to 350 size
CHEVY BIG BLOCK V-8 BORE AND STROKE
366T - 3.935" x 3.76"
396 - 4.096" x 3.76"
402 - 4.125" x 3.76"
427 - 4.250" x 3.76"
427T - 4.250" x 3.76"
454 - 4.250" x 4.00"
496 - 4.250" x 4.37" (2001 Vortec 8100, 8.1 liter)
502 - 4.466" x 4.00"
572T - 4.560" x 4.375" (2003 "ZZ572" crate motors)
T = Tall Deck
ALL production big blocks used a 6.135" length rod.
366T - 3.935" x 3.76"
396 - 4.096" x 3.76"
402 - 4.125" x 3.76"
427 - 4.250" x 3.76"
427T - 4.250" x 3.76"
454 - 4.250" x 4.00"
496 - 4.250" x 4.37" (2001 Vortec 8100, 8.1 liter)
502 - 4.466" x 4.00"
572T - 4.560" x 4.375" (2003 "ZZ572" crate motors)
T = Tall Deck
ALL production big blocks used a 6.135" length rod.
CHEVY 348-409 V-8 BORE AND STROKE
348 = 4.125" x 3.25" (6.125" rod)
409 = 4.312" x 3.50" (6.010" rod)
427 = 4.312" x 3.65" (6.135" rod) 1963 "Z11" SHP drag race
348 = 4.125" x 3.25" (6.125" rod)
409 = 4.312" x 3.50" (6.010" rod)
427 = 4.312" x 3.65" (6.135" rod) 1963 "Z11" SHP drag race
