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Chevy V8 Bore and Stroke List Small Block Chevy Casting Numbers
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Chevy V8 Bore and Stroke List:

CHEVY V-8 BORE AND STROKE LIST
CHEVY SMALLBLOCK V-8 BORE AND STROKE LIST
 
262 = 3.671" x 3.10"	(5.7" rod)
265 = 3.750" x 3.00"	('55-'57 Gen.I 5.7" rod, '94-'96 Gen.II 4.3 liter V-8 "L99" 5.94" rod)
267 = 3.500" x 3.48"	(5.7" rod)
283 = 3.875" x 3.00"	(5.7" rod)
293 = 3.780" x 3.27"	('99-later "LR4" 4.8 Liter Vortec)
302 = 4.000" x 3.00"	(5.7" rod)
305 = 3.740" x 3.48"	(5.7" rod)
307 = 3.875" x 3.25"	(5.7" rod)
325 = 3.780" x 3.62"	('99-later "LM7" 5.3 Liter Vortec)
327 = 4.000" x 3.25"	(5.7" rod)
350 = 4.000" x 3.48"	(5.7" rod)
350 = 4.000" x 3.48"	('96-'00 Vortec, 5.7" rod)
350 = 3.900" x 3.66"	('89-'95 "LT5" in "ZR1" Corvette 32-valve DOHC)(5.74" rod)
350 = 3.900" x 3.62"	('97-later Gen.III "LS1")(6.098" rod)(actually totals 346 cubic inches)
364 = 4.000" x 3.62"	('99-later "LQ4" 6.0 Liter Vortec)
383 = 4.000" x 3.80"	('00 "HT 383" Gen.I truck crate motor) (5.7" rod)
400 = 4.125" x 3.75"	(5.565" rod)


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 3.76" 	(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"
502 = 4.466" x 4.00"


T = Tall Deck


ALL production big blocks use a 6.135" length rod.
CHEVY 348-409 V-8 BORE AND STROKE
 
348 = 4.125" x 3.25"	(6.135" rod)
409 = 4.312" x 3.50"	(6.0" rod)
427 = 4.312" x 3.65"	(6.135" rod) 1963 "Z11" SHP drag race

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