No. This isn't possible.
Although the overall form factor is the same (1U) the internals are compeltely different. The motherboard size and layout, power suppies (single vs. dual), disk interfaces (4 PATA vs. 3 SATA/SAS), PCI slot placement, etc. - even standard ports like ethernet, USB, are all in different places so the case won't line up.. I'd say there's an less than 0% chance that this will work.