I imagine the M88 would be the ideal vehicle, but how feasible would it be for an LAV25R to remove the power plant from an Abrams tank? Obviously the LAV has an extending boom crane, but I cannot find details of the weight of the power plant itself.

Per FM 10-450-5/MCRP 4-23E, VOL III/NWP 3-04.13/AFJMAN 11-223, VOL III/
COMDTINST M13482.4A

11-2. Full-Up Power Pack (FUPP) Container, M1A1
a. Applicability. The following item in Table 11-1 is certified for the helicopter(s) listed in the following table by the US
Army Soldier Systems Center:
Table 11-1. Full-Up Power Pack (FUPP) Container, M1A1
NOTE: This container is only certified with the M1A1
FUPP and is NOT certified empty.
b. Materials. The following materials are required to
rig this load:
(1) Sling set (25,000-pound capacity) with one additional
apex fitting.
(2) Tape, adhesive, pressure-sensitive, 2-inch wide
roll.
(3) Cord, nylon, Type III, 550-pound breaking strength.
(4) Webbing, cotton, 1/4-inch, 80-pound breaking
strength.
(5) Strap, cargo, tiedown, CGU-1/B (as required).
c. Personnel. Two persons can prepare and rig this
load in 15 minutes.
d. Procedures. The following procedures apply to this
load:
(1) Preparation. Prepare the load using the following
steps:
(a) Secure all equipment inside the container with
tape, Type III nylon cord, or tiedown straps.
(b) Ensure all container doors and vents are closed
and secured with tape or Type III nylon cord.
(2) Rigging. Rig the load according to the steps in
Figure 11-1.
(3) Hookup. Two hookup teams stand on top of the
Hope this helps!

I'm not sure the LAV-R crane would be OK for the job. AFAIK This crane has a 1040 - 4125 kg capacity (depending on extension) and the M1 power pack weighs approximately 8,500 pounds (3,855 kg)...a rather narrow security margin isf you ask me

H.P.