So i want to put 3:73's in my truck. i only have the 8.8 rear end, will they be the same as my front end???

I Sell the parts but my computer doesnt tell me specs etc. im not half assing it and just doing my rear end. i had this trouble with my chev, guy had 3:73 in the front and 3:55 in the rear i ended up blowing my rear.

my question is does anyone know if i can buy 2 of the same kits or not my supplier doesnt list it either. im stumped. and i dont like the 3:55's? it came with

 

Good question...being that the front diff on mine is 8.8 and the rear is 9.75 and both have 3.73's