M2 Machines is a manufacturer that produces classic cars, trucks, and 18 wheelers. One of their most recent series is the HEMI 50th anniversary. Their diecasts are 1/64 and 1/24. Their work is astonishing as far as detail goes, one car at Walmart is worth approx. $6 to $20.
Official page for M2 Machines Collector: M2 Machines Fandom