273 Commando

I had a 312 solid lifter motor in my 57 Fairlane 500. That was one smooth cat. Quiet as a motor could be too. There are many solid cam 340's out there as they are a free breathing high revving motor. The 318 and the 360 were not meant to be high revving so you don't see many of those running solid cams. Also lobe design and hydraulic lifter design have advanced to the power point of solids without the hassle of a bi annual valve lash. Run what you like but most solids still have a power band that is wider than a comparable hydraulic.