Crank case work for bigger kits!

What you linked to was a transmission case so er no.

As far as I know polini don't sell actual engine cases. They sell built engines but they are insanely expensive.

These sort of kits aren't the sort of thing anyone can buy and slap in. They take lots of work and other uprated parts to make the most of their power and constant maintenance otherwise they go bang very quickly.

Lots of fun however!