I have plans to modernize the engine and the entire car.
Well I guess it depends on just how "modern" you intend to build your mid fifties car. . .
A 250 or 292 would get you into the '70s - whereas a Vortec 4200 would get you into this century . . .
If the stock block matters to you then continuing to search for HP adders on the 235 is the way to go. Especially if you really mean "drop in". But if you are seriously considering an engine swap then you face mods like fabrication of engine mounts and more . . . leading to the question - what do you want from this build?
