...sorry for my bad english, it is a "tow truck" not a "howling truck" - how stupid!
Anyway, what I found out now, there is a german made 239 V8 Engine! The number is G29T. It has an old Block with the distributor in the rear and newer 24 bolt heads with the water outlet in the front corner. I searched at "google" for "G29T" and found some information.
Thanks
Claus