getting 600 hp out of mark V block

[grumpyvette]

Hi guys, I have been looking for a 454 block with 4 bolt mains. It seems to be getting very hard to find, and expensive. I came across a standard bore 4 bolt gen V block for pretty cheap. I know the design differences between the gen IV and V. I don't mind running an electric fuel pump, and I like the idea of a one piece rear seal. Can these blocks be used in say a 550-600hp build? I'm thinking about a 496 stroker set up. I've looked and see that there is plenty of aftermarket parts available for the gen V. So I'm asking you guys your opinions, as you always seem to have great info to share. Thanks for any help.
Dave

MARK VI BLOCK OIL CONNECTIONS

http://scatcrankshafts.com/#6

yeah! scat makes forged rotating assembly's and most of the aftermarket head, and cam, manufacturers make heads and cams that will allow you to reach that 600 hp goal with that mark 5 block, the chevy MARK V block is seldom the weak point in a big block build when the goals 600hp or less, Ive had zero issues using them at that power level.
ear.

12/13
All ’87-and-later Chevy blocks come with a one-piece rear-main seal. This requires the use of a late-model one-piece rear-main seal crank. Starting with the ’88s, most passenger-car engines converted to hydraulic roller cams that required a spider. This is a truck block where the spider mounting bosses are not drilled and tapped, because the truck engine used a flat-tappet cam. These can be easily drilled and tapped to mount the spider for a hydraulic roller cam.

mark iv blocks

mark v blocks

(keep in mind that ALL '91 and later Gen.V and Gen.VI big blocks come with 4-bolt main caps. The two-bolt big blocks are no longer in production
MANY BUT NOT ALL aftermarket head designs have been modified to work on both the early MARK IV 1965-90 and later MARK V & VI blocks 1991-later.)
BTW, , on BIG BLOCKS the oil pumps and oil filter adapters are different due to the block oil filter recess and rear seals being different
GEN 4 or MARK IV

GEN V and VI

MARK VI BLOCK OIL CONNECTIONS
RELATED INFO
viewtopic.php?f=44&t=4543&p=12111&hilit=hemi#p12111
http://bangshift.com/general-news/ebay- ... never-run/

most big block blocks will take a .060 over bore without issue some will take .100 but your almost sure to have very thin bore walls that won,t seal the rings well, and keep in mind many of those blocks have internal water passage rust issues after all many are 25-30 plus years old

bore x bore x stroke times 8 x .7854= displacement
example
a 4.310 " x 4.310" x 4.25" x 8 x .7854=496 cubic inches

read these links and sub links

viewtopic.php?f=69&t=1420

viewtopic.php?f=69&t=5123

viewtopic.php?f=69&t=6125

viewtopic.php?f=69&t=189

BUY A FEW REFERENCE BOOKS ITS MONEY VERY WELL SPENT

yeah! I know most of the readers will ignore reading the sub links, those that take the effort will have an advantage
http://forum.grumpysperformance.com/viewtopic.php?f=87&t=951&p=1627&hilit=mark+single#p1627

viewtopic.php?f=69&t=5123

viewtopic.php?f=69&t=9930

viewtopic.php?f=69&t=10181

viewtopic.php?f=69&t=1420

viewtopic.php?f=69&t=8807

viewtopic.php?f=69&t=8215

viewtopic.php?f=52&t=319&p=34886&hilit=oval+port+cast+intake#p34886

viewtopic.php?f=52&t=410&p=8312&hilit=oval+port+cast+intake#p8312

viewtopic.php?f=44&t=752

viewtopic.php?f=44&t=10530