Chevrolet - GMPP GEN VI 427/454CI BIG-BLOCK BARE BLOCK
     This is a special GM Chevrolet Gen VI Big-Block bare block with 4.25” cylinder bores with four-bolt main bearing caps used for both 427ci and 454ci engines.
Key - gmblock
Price & Parts Search
Part Numbers, Company, Part.
Use 8 digit GM #’s 00476525
Page Search
Search the pages of our site.
CLEARANCE
FRAMES
Updated 09-09-2004.
Viewable With Any Browser Valid HTML 4.01! Valid CSS!
 WEB SITE NAVIGATION
HOME
ABOUT US
SITE INDEX
SITE MAP		 PRICE SEARCH
INFORMATION
CATALOGS
LINECARD		 SALES
FUN
CHAT
FAQ		 PART FINDER
PRODUCTS
PHOTOS
PRICE LISTS
PRICE SHEETS		 CUSTOMER’S
WHAT’S NEW
DISCUSSION
HOT PLACES		 ORDERING
REQUEST
SITE HELP
HOT STUFF
GM & SC
HOLLEY
AFR		 EDELBROCK
FLUIDAMPR
R&M		 SCAT
MSD		 DEMON
WORLD		 HUGHES
TREMEC		 RICHMOND
PROFORM

 GEN VI 427/454CI BARE BLOCK DESCRIPTION
P/N 12561353
     This is a special Gen VI bare cast iron block with 4.25” cylinder bores with four-bolt main bearing caps. It has a machined fuel pump pad, one-piece rear main seal design and standard 454 deck height.
     Technical Note: The maximum cylinder bore is 4.25” plus .060” O.S. and will require the “Gen V/GenVI” design one-piece oil pan. Casting P/N 12550313 [Old P/N 12550307]

 GEN VI 427/454CI BARE BLOCK SPECIFICATIONS
Block Material:
Cylinder Wall Type:
Deck Height:
Cylinder Bore Range:
Cap Bolts:
Cap Material:
Crankshaft Journal Dia.:
Oil Sump Type:
Crankshaft Seal:
Design Max. Stroke:
Weight (bare):
Intended Usage:
Fuel Pump Boss:
 Cast Iron
Non-Siamesed
9.800”
4.250-4.310”
Straight, 4 Bolt
Cast Iron
2.75”
Wet
1 Piece
4.600”
N/A
Street
Has Fuel Pump Boss
Non-Standard Parts Required Special Features:
 Production Style with Fuel Pump Boss & Has 1 Piece Rear Main Seal.