Thread: 496-2 bolt block-jacuzi nozzle

What makes this a 496 block? Looks like a regular 454 to me if it is 4.250/4.280/4.310..........Is it a MK IV??? or ????what........A 496 needs a crankshaft that is a bit longer than 4.0, like 4.25.......Please explain, if this is a factory 496, what is the bore?.........And did they really make a 2 bolt 496 truck engine?..Just a little confusing.....Ray

come on guys jump on it

No crank? What happened to the crank? Is it an old style 2 piece rear seal or new style 1 piece rear seal? Looks like an older 2 piece rear seal, so it cannot be a 496 without a stroker crank right? Otherwise it's just a 454, possibly larger with some overbore. Isn't the 8.1L (2001-2003?) truck engine (no longer put in trucks by GM) a 496? My dad has a 2001 Crew Cab 4x4 with an 8...

its a mark 4 block 454 60 over witch is now a 496 2.250 crank 4.310 bore perfect condition have the invoice from DNE dave checked it out its ready to go,im using every thing in the motor to build a 1000 hp motor

If it's a .060 454 block then it's a 468. It is not a 496 until someone puts a 4.250 crank and 6.385 rods. in it.

Quote: Originally Posted by Blue If it's a .060 454 block then it's a 468. It is not a 496 until someone puts a 4.250 crank and 6.385 rods. in it. Well played.

thats a .060 over 427 = 440 why would the block care what crank you throw at it???? hell throw a set of splayed caps on it and run it.

I think the point here is he is posting a 496 for sale its really not one without the crank, It should be advertised as a .060 over 454block with 2bold mains, Honestly its still not a bad deal if it could be honed out & used as-is.

It's a great deal if it can be honed and reused, just wanted to point out it's not a 496 without the stroker crank, and he is selling block and main caps only, no crank.

Quote: Originally Posted by nasty toys racing sorry for the mis rep, your rite 454 60 over block, put what ever crank you want in it to make your combo,thats were i was leading just worded wrong No Prob, $250 is a good deal. If it were winter time and I didn't need money for my boat/fuel for my boat/truck to go ...