The B235 engine is a T7 engine, its the GM Ecotec engine that is T8 in Saabs.
The B205/B235 engine can be found in all og9-3's and 9-5's upto and including MY2009, the newer 9-3SS and 2010 and later 9-5's have the T8 engine.
The B235 engine is normally easier to find since it ran for 11 years in the 9-5 (and a few years in the Viggen) vs. the B205 only running for 3 and a bit years in the og9-3.
I'd suggest sourcing one from a 2006 or later 9-5, that is around when the final iteration of the PCV system was introduced so the 9-5's came fitted with it from the factory and are less prone to sludge.
The B205/B235 engine can be found in all og9-3's and 9-5's upto and including MY2009, the newer 9-3SS and 2010 and later 9-5's have the T8 engine.
The B235 engine is normally easier to find since it ran for 11 years in the 9-5 (and a few years in the Viggen) vs. the B205 only running for 3 and a bit years in the og9-3.
I'd suggest sourcing one from a 2006 or later 9-5, that is around when the final iteration of the PCV system was introduced so the 9-5's came fitted with it from the factory and are less prone to sludge.