The Hurcules is an M88A2. It is an upgraded M88 chasis, not built on an Abrams chasis.
The AEF kit is a conversion kit and you still need the AFV Club M88A1 kit to build an M88A2. I heave heard it is not a very good set. AEF is hit or miss on their quality. Pretty pricey too.
Looks like this:
A Google Image Search for M88A2 will give you lots of pics too.
Here is more info on it.
http://www.globalsecurity.org/military/systems/ground/m88a2.htm
http://www.ngaus.org/legislative/ARNG%20Fact%20Sheets%20FY06/FY06%20M88A2%20Hercules%20_CV%20TF_%20Fact%20Sheet.pdf
With pics:
http://www.fas.org/man/dod-101/sys/land/m88a1e1.htm
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