I have a very early built 72 Demon 340(7-71) It was all original when I bought it in 1985. I recently disassembled the engine for a rebuild. It came with the 915 J head with 1.88 intake valves, it is also a forged crank engine.
1972 Cuda. 410 ci stroker motor with a Mopar Performance 6 barrel setup. The motor (around 50 miles since built) was built with a Scat forged crank and Scat H beam connecting rods. The pistons are Probe. The heads are CNC ported aluminum with 2.02 intake valves, Hughes Engines hydraulic roller...