Hmmm. A cam in block , pushrod engine, like the FCA hemi is a dinosaur eh? The age of a particular design doesn't equate to obsolescence. As long as these kind of engines can perform efficiently, make good power and meet cleanliness standards and still not break the bank, they are by no means obsolete. GM still prefers that same design in their LS series of V8's, and they're very good engines.
I guess by your definition, the Cummins in line 6 cylinder in your signature, a cam in block, mushroom solid lifter flat tappet, pushrod engine, is also a dinosaur. I certainly don't think so. I've owned two, and they are great motors.
Good designs are timeless. Maybe at some point the only engines being of by OEM's will be little turbocharged 1 liter overhead cam screamers, but I won't be driving one of them.
