I'm all over the place with that one. My 54 has a Cleveland 239. Its not as bad as having a Dearborn engine, but it is still a step child. It is not nearly as good as a 57 engine. I don't know if I want to convert much of this one over to the 57 and later type or ditch it all for a later model 5.0 or such. I really wanted to stay with the Yblock until I read where it weighs in only 14# less than a 460. I need several patch panels as well.