Hay Art,
Yes...I have planned on building a PB4Y for years and looking forward to the build one day. The Jack Stanford kit is 90" wing span (I believe) and I have all the goodies to build up the model. The Stanford Liberator was built and flown with K&B .19's and flew quite will with these engines. I saw it fly at the old Sepulveda Basin flying field in San Fernando Valley, Los Angeles in the late 70's or early 80's. I was amazed at just how well the model flew and his build manual was really a nice read all it self. He had a bit of humor in his manual and it makes for a nice time building the model.
What did the full G.W. come out on your model?
Happy 4th. of July,
Bobby of Maui