will 1/2 ton front end parts will work for a 3/4 ton front end?

they should work fine. if its a 2 wheel drive then the only real difference between the two are rear end parts. such as the springs, gears, sometime the whole rear end.

it is 4 wheel drive.

even then on that year of truck the front should be the same... what parts are you wanting to change? the front suspension such as spindles, a arms, cv shafts, and such should all be the same. gm wanted to keep a have decent ride with their truck so they made the heavy half and 3/4 ton trucks with the same front end components and changed the rear springs. the only difference you might have is bolt patter front 5 to 6 or 8 lug. but the old rotor should fit on fine.

ok. i will check it out

the half ton parts will not work for a 3/4 ton

Change a half ton truck to a one truck