I've found that pushing in the clutch, shifting into 2ng gear, and then moving the lever into 1st gear or reverse is the method that produces zero grinding.

Second gear is syncronized but first and reverse are not, so putting the trans in second and then moving to 1st or reverse results in smooth shifting with no grinding.

1950 Chevrolet 3100 (Ol' Roy)

1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)