The Volvo B36 could be a Stude except for its skirted block and single bolted rocker shafts. The water pump is higher. There are fewer head bolts on the B30. The mains are the same at 2.5 inches but the rods of the Volvo B18 four and B36 V8 are a fraction more than the Stude 2 inch journals. Bearing thrust on the Volvo is probably not at the front like the Stude. Intake and dual carburetion looks different but porting seems similar. Otherwise they are as peas in a pod, but the Volvo, stout as it was, managed to weigh less.