i no im not a newbie but i need to no this asap, i have a 8 1\4 out of a 69 slant 6 belvedre and i need t on othe gear ratio? i spun the side axel and for every 1 turn of the axel the drive shaft turned between 1.25 and 1.5

i need to no ASAP thanks everyone

i was thinking they are maybe 273? does anyone no?