rear end id please

[300]

Hi. on the rear end drivers side fround these #,s   285 10       2070741    aapw   dd c10     X    could someone please id these Thanks Terry   new guy with the cuda.

[OUTLAW]

8 3/4  with 741 dropout housing (least desireable of the 3 housings )

[300]

What can i use for a better housing or gear etc, why is this the least desirable Thanks Terry. this is i asume not a posi  #,s

[OUTLAW]

 When I say its the least desirable its only because it is the smallest of the pinion diasmeters and gear selection is almost nil. Actually I have a 741 with posi and it hasnt caused me any problems ....yet The 489 (tapered pinion ) and the 472 are supposedly better but if you aren't building for gobs of HP you will get along fine with it. To be honest I have puked one of each so its just a roll of the dice

[Chryco Psycho]

the casting #s have no bearing on wether it is or is not a sure grip diff