I am still waiting to hear what the RPM is at idle.
I have a T-5 which is synchronized in all gears, but will grind a little in first or reverse it I have the throttle cable pulled out for warming up the engine on start up. When I push the cable back in, everything shifts like butter.

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission