Mar 26, 2021 · The 6223 crank in the L78 engine presently running in my '69 SS Chevelle is a crossdrilled unit, as is the 7115 427 crankshaft sitting on the bench (and pictured above). As I …

Feb 2, 2022 · the -6223 cranks were made with 5140 forged steel IIRC. the 4340 cranks made today are stronger though i bought a couple of brand new -6223 cranks a few years ago, using …

Mar 31, 1999 · The 6223 crank is 1053 steel & not cross-drilled or tuftrided while the 3856223 is 5140 and cross drilled and tufftrided or whatever they called the crank treatment they …

Feb 2, 2022 · Gene ACES 3112/Team Chevelle Gold #62 67 SS396, MJ467,M23Z, oem 12bolt. Original skin/int.

May 1, 2012 · Running a 6223 balanced crank,.050,.050.in my 427 Elky for over 3 years,lots of hard stick shift passes@ 7200+.Don't know my hp,whatever it takes to make 4000lbs. go …

Apr 30, 2005 · In short, the 6223 "rang" better than any of the others ( including a new OEM blem 6223 that was a few bucks cheaper). Pretty scientific huh? That's what the machinist said to …

Apr 11, 2008 · 1968 Chevelle Sb 1969 Chevelle 496 1973 SS 454 Chevelle 1974 S-3 454 Chevelle 1955 Delray LS1 1967 Nova 496 1969 nova 427

Dec 19, 2006 · One reference book I have has the 6223 listed for 396(65-69)/402(70-71) blocks only. The 366, 396 and 427 did share the 4815 and 4816 cranks and the 396/366/402 shared …

Apr 8, 2003 · And crate L88's after those years, found a beat up 7115 in mine.( 1972-3 crate 88) One reason I went with the higher $ SRP pistons was the weight savings which caused the …

Jun 29, 2003 · There were in fact 6223 forged, crosdrilled, and nitrided cranks. I have a special NOS two piece (broken) one in my garage. The 7115 piece was used in 68-69 L88's and 69 …