I have a super low hours(about 20) Gen 6 454 HO block, standard bore, with fuel pump boss.  I will also supply a nice Gen 6 427 crankshaft, and a set of used GM rods with forged TRW pistons (std bore), small dome, should be close to 10-1 compression with open chamber heads.  $1000 for all of it.  Note, the assembly is not balanced. 

Also, for someone looking to build a decent engine on a beer budget, I have a set of Gen 5/6 peanut port ovals that have been match ported to a larger oval port gasket, freshly rebuilt and not run, $300.

peanut port to oval port???
I thought it went from rectangle port manifold to oval port heads
peanut port doesn't flow enough for a jet boat!
Go oval or rectangular or go home 

Daniel
Mash on it

Lots of guys tried this as a low buck trick, I have not put an engine together with a set of heads like that, but think they would probably be fine for a 5000 rpm 427 inch jet boat engine.

i am interested in just the block?how much?

I kind of prefer to sell as a package, since the std bore pistons are not worth much without a standard bore block to put them in.  I would want $750 for the block alone.