Page 207 of GM Performance Parts 2006 Catalog by GM Parts Direct

Timing Chain Cover Gen V VI H Mark IV Big-Block Chrome Timing Cover I 3743389 Freeze Plug, steel (Mark IV) (not shown) Steel freeze plug for Mark IV (1965-1990) engines. 3826963 Freeze Plug, brass (Mark IV) (not shown) Brass freeze plug for Mark IV (1965-1990) engines. Suitable for marine applications. F. 88891749 Freeze Plug, brass (Gen V Gen VI) Brass freeze plug for Gen V and Gen VI (1991-and-newer) engines. Suitable for marine applications. 12480035 Cylinder Sleeve (Standard) (not shown) Steel cylinder sleeve for aluminum block P/N 12370850 only. Sleeve has 4.240" bore and finish-bores to 4.250". 3902885 Windage Tray Stud (not shown) Used for mounting splash shield P/N 3967854. 10224104 Windage Tray Stud, Gen V 454 502 (not shown) Used with Gen V 454 and 502 engines. G. 88958656 Windage Tray Bolt, 572 Used with 572 engines. FRONT COVERS TIMING POINTERS H. 10230954 Timing Chain Cover Aluminum cover with timing indicator fits all 1996-and-newer Gen V VI engines; currently used on 454 HO and 502 HO crate engines. I. 12342091 Big-Block Chrome Timing Cover Cover with oil seal for Mark IV big-block (1965-1990). Use replacement oil seal P/N 10191640. Windage Tray Bolt, 572 G 205 Freeze Plug, brass (Gen V Gen VI) F

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