If you look at this realistically, there is not a lot of value there, as it sits. Why? Because there are far too many unknowns.
- there's a difference between being told that a block can be successfully welded to repair damage and actually having that come true.
- the cost of that repair is also unknown
- we don't know if the block can be successfully bored for oversize pistons or not
- if the crankshaft has not been removed and checked out by a machine shop, then that part is in limbo when it comes to usefulness.
- when a rod lets go, then every part becomes suspect for damage as well as wear and tear. The hours on this engine are unknown and that's why there is a thing called a "short block engine". One of those eliminates all those questions because you are starting with a brand new engine block with all the internals.
- so if it turns out that little to nothing from the short block can be salvaged, then what is left over? Flywheel, intake manifold, carb, heads, stator coil, oil pan and all the engine tins.
I'm not trying to be harsh here but you did ask what value your blown engine has and I'm attempting to explain why the value is low. Rarely are any of the above items needed with the exception of the carb. If you want to max out your return, then you have to be prepared to do what Joe Hemmi does. Dismantle the engine 100%, inspect each part and then place it on e-bay piece by piece.
Of course, there's your time to do that, listing fees, sales fees, Paypal fees, time for packing and shipping etc etc. in order to realize the max return. Anyway, you have begun this thread, so let's see what offers it brings.