Woolfster,
Your link didn't show a Hemi.
If you are talking about the "Visable" Hemi, it is a very nice model. However, when motorized, either it turns backwards or the fan is made wrong! Go figure!
I note on building this model. I used Testors glue for clear plastic in order not to craze the plastic. This stuff works very well if you don't mind using rubberbands to hold it together until it drys. It took a while to build because of this. I didn't glue the valve covers down so they could be taken off to see the valve train a little better.
Also be very particular about getting the valve guides in correctly so that they don't bind up the valves. I put mine in, making sure everything moved easily then I took the glue and ran it around the edge of the valve seat and let them dry for a few days.
I also had a problem with the air cleaner fitting properly and the fuel filters and gas lines fitting right.
Overall it is a nice conversation piece.