It is a 427 Pablo, hence the valve covers. Unfortunaltely it is not an original 427 or 428 FE engine. The big blocks are hard to find these days and very expensive to build. Not that this one was cheap, lol!
FWIW, Smeding Performance takes their own cast block that is a 351W and strokes it to 427. It kicks out a whooping ~500hp and ~540lb-ft of torque. The car weighs ~2300lbs. It runs on 93 octane pump gas and is 10.5:1 compression.
And yes, it does leave black streaks on the street! Look at my video of the first drive... I suspect there might be some on the seats if I am not careful!!!!