Kevin is correct we've done two Alco sounds. We are hoping to get the 244 engine and a 16-251 with electric start this summer. Also on the hit list is a U30C and a C30-7 (FDL-16) pre 1980 and post 1980 with the EPA muffler but before GE changed the engine rpm speeds on the Dash 8 model and above to only 3. Probably for emissions compliance. As for the PA engine I believe this was a 16-244 and I'm not sure if any are in use in the USA. I'm not sure if there is any in service in Australia or not, as they we big Alco users. The C-415, 8-251 engine is something we would like to get as Bowser has announced this as an upcoming model.