@ok4450, the 390 big block is the engine Ford put in the Thunderbirds from the sixties. This 390 I have came from a rusted out sister car with severe damage that I stripped for parts before letting it go. According to my research, the '61 to '63 “bullet birds” had options for a 2-bbl 390, a 4-bbl 390, and the tri-power (3 X 2-bbl) 390. I have the 2-bbl and 4-bbl cast iron manifolds for this engine.
But, a 70 Chevelle with 1100 ft-lbs of torque and 38 MPG?!? Reason enough to look at a Diesel conversion!
P.S. @ok4450, sorry for the response, I mis-read your comment. I’m building a driver’s car, not a trailer queen. I can rebuild a 4.6L for the same cost as restoring the 390, but get better reliability and triple the gas mileage with very little difference in performance. Just like the spirit in the rest of this thread. Besides, the '62 is a classic, but not all that rare. There are plenty of surviving ‘thoroughbreds’ out there for the purists to enjoy.