It looks like they mount on the underside of the bellhouse, but the completely enclosed bell houses dont have provisions for mounting underneathThe 1999 K1500 suburban my brother and I parted out had them. I actually still have them at the shop. Found them recently. If I had known they were still around, would have put them on the 4L80E in the van when I put the 383 in. Since their brackets bolt under the motor mounts, would be a nightmare to add now. I have a matching 4L80E aluminum converter cover that bolts to those rods to strengthen everything. The 4L80E applications even had them in 2wd on some things.