correct z bar for early a body SB 4spd
And here’s 3 pics of early A Z Bars:
First one is from an original 65 Barracuda 273 4 speed - 7.5 in - just pulled last week
Next one is from a 65 Valiant Slant 6 4 speed - 7.5 inches
And the last one is from a 65 Dart GT 273 4 speed - also 7.5 inches
Can’t say why your new one won’t work