720 center chunk swap????

[bandytZ24]

is there any chunk or rearend swap for my 85 720, think mine has 410 gears, looking for somthin better.

[Smyrna720]

If you're not sure what you've got, look first. Look either under the hood or in the door jam for a sticker or plate. It's going to have everything about your truck on that sticker. You need to look for an axle code. If you have 4.11's you'll have an HF41. If you have 3.70's, which most likely you do, it'll say HF37.

Now, whats better for you? Do you want less RPM's on the highway, or do you want more pulling power down low?

[bandytZ24]

definitely want more grabbing in the rear. been doing a lil research found out its not 4.11, and the data plate is not visible.