Some people do use truck turbos, there have been some bonkers euro builds using them. Historically the diesel turbo's used different materials as the exhaust gas temperature is lower compared to a petrol equivalent whether this still applies I do not know, but lots of diesel turbo's are not watercooled where as the majority of oem petrol units are.

We have a truck turbo in the workshop and it is just silly big, like snap your manifold off big