Chengdu Hongtai Machinery Co.,LtdDetailed Product DescriptionGM SMALL BLOCK- 305/350/400 RODBE Bore2.225" BE Width0.941" PE Bore. 0.927"Part Number EngineDescriptionCRS-5565GM 305/350/400Center 5.565" Weight 630G.CRS-5700GM 305/350/400Center 5.700 " Weight 635G.CRS-5850GM 305/350/400Center 5.850 " Weight 645G.CRS-6000GM 305/350/400Center 6.000" Weight 650G.CRS-6125GM 305/350/400Center 6.125" Weight 660G.CRS-6200GGM 305/350/400Center 6.200" Weight 660G.CRS-6250GM 305/350/400Center 6.250" Weight 670G.GM SMALL BLOCK-283/327 RODBE Bore2.125" BE Width0.941" PE Bore. 0.927"Part Number EngineDescriptionCRS-5700SGM 283/327Center 5.700 " Weight 640G.CRS-6000SGM 283/327Center 6.000" Weight 655G.GM BIG BLOCK - 396/454/502BE Bore 2.325" BE Width 0.991" PE Bore. 0.990"Part Number EngineDescriptionCRS-6135GM 396/454/502Center 6.135" Weight 780G.CRS-6385GM 396/454/502Center 6.385" Weight 790G.CRS-6535GM 396/454/502Center 6.535" Weight 800G.CRS-6625GM 396/454/502Center 6.625 " Weight 810G.CRS-6700GM 396/454/502Center 6.700" Weight 820G.CRS-6800GM 396/454/502Center 6.800" Weight 850G.CRS-7100GM 396/454/502Center 7.100 " Weight 860G.GM DURAMAX RODBE Bore2.637" BE Width1.115" PE Bore. 1.358"Part Number EngineDescriptionCRS-6420GM DuramaxCenter 6.420 " Weight 1140G.