boy&hisdogs
I'm Awesome
Are they perhaps from a 2500LD the OP was talking about then? Note he said those will lift the rear the same as the AAL. I believe those came with the 14 bolt with the 2500 6 lug trucks. Or they aftermarket?
I honestly don't really know what the "heavy half" is on the GMT400, but sounds like it's the same as the 2500LD? I'm always confused on those trucks, LOL.
"Heavy Half" is the 1500HD, which was a GMT800 truck. It had 8 lug axles, a 6.0, a 4l80e, and stiffer springs and a few other goodies. It was a rare option.
As for GMT400s, we have two 2500 models. We have the "light" one that was six lug and had a 7200# GVWR rating. It was essentially a half ton but with the 9.5" 14b SF rear end and stiffer springs. It still had all the 1500 front end parts, including the smaller 8.25 front diff.
We also had the heavier 2500 with a 8600# GVWR. That was an 8 lug. This came with either the 10.5" 14bFF or the 9.5" SF but with bigger brakes than the LD 2500 (13" vs 11") and the bigger 9.25" front end.
BUUUUUTTTT then there was the "F44" option for the 1500s that gave you the 9.5" 14b SF rear end out of the LD2500. People refer to this as the "heavy half" sometimes.