looking for a straight axle what do you recommend it is A 94 gmc 1500 4x4  

cant go wrong with a dana 44, lots of aftermarket and plenty of strength  

A Ford D44 so you have the differential on the driver side, as long as you don't go bigger than a 35" tire for hard wheeling and don't put a locker in it.  Use a Ford D60 if you will be using 38" or larger tires.  For really hard wheeling a D60 for 35" tires and up.  

Im probably going to use a dana 60 but what should I do about the rearend its stock. Is that bad for your front axle to be a heck of alot bigger than your rear?  

Put a 14 bolt in the rear.  The 9.5 semi-floater (good for up to about 38" tires with alloy axle shafts) or 10.5 Full Floater (will have no problem with 44" tires with alloy axle shafts).  

make sure you match your gear ratios in the axles  

GM1tonOfFun:
Put a 14 bolt in the rear.  The 9.5 semi-floater (good for up to about 38" tires with alloy axle shafts) or 10.5 Full Floater (will have no problem with 44" tires with alloy axle shafts).

Before I would spend the time and expense to use a 14 bolt 10.5 with expensive alloy shafts I would simply round up a AAM 11.5 or D80 and use it as it is a lot stronger stock than a 10.5. The 11.5 and D80 have about a 2 inch diameter input spline on pinion vs 1.75 for 10.5 and 1.875 for 9.5. Alloy shafts are not without a catch in that as rear axle is designed, they kinda act as a fuse and fail before more a more catastrophic failure occurs. When shafts are beefed up too much you are flirting with more expensive failures hence the reason I suggest simply using a 11.5 or D80 to begin with.  

geeze every time i reply to a post it seems like SnoMan thinks the same way as i do. heck if you want to really get some pull, then go with some rockwells