Big Inch Small Block

Acquaintance of mine ran a 468 in his 71 demon for several years. Cover car on Mopar Muscle, street driven nine second n/a car. Also had a later build Valiant on the cover too.
He built a 502, (yes, small block) but it was just too over the top, internals were too light, it didn't last long. While it was running, it made power!
Ron Silva ?