Engine/Transmission (1994 - 1998) 1994 vs 2001 front rotar specifications?

[Smokin Ram]

i need your guys help here, i have a 1994 dodge cummins, i have installed a 2001 dana 80 rear axle with disc brakes. I still have the original dana 60 in the front with disc brakes. i have up graded the breaking system to the pump driven off the power steering, its out of a 2001 3/4 ton with rear disc brakes. K, i think i have warpped my front rotars, it seems to have a pulsation in the foot peddle when braking. I want to know if there is any difference in the "quality" or specifications in front rotars between a 2001 rotar and a 1994 rotar, was anything changed. I ask this to see if my front rotars on my 94 are "inadiquite" and if they will bend again after i turn them down, or eventually by new ones. Thanks guys for the help in advance. Ps sorry if this is not in the right forum.