For what it is worth, here is how I replaced my tired hatch lift supports for cheap.
Your local Autozone should stock Mighty-Lift 95237 supports. This lift has the right gas tube but doesn't have the right brackets to bolt into an 80. I got them for $25.99 each with a lifetime warranty. You can reuse the brackets from your old lifts with a few minutes work and $1.82 worth of hardware per side from the bolt aisle at Ace Hardware. The attached picture shows a Toyota support compared to a modified Mighty-Lift support.
Tools
--------------------------
Drill with 1/4" and 1/2" bits
7/16" wrench
big screwdriver.
Hardware (2 each per lift)
-------------------------
1/4"x3/4" truss head slotted machine screw
1/4" nylock nut
1/4" flat washer
3/4"x1/2"x1/8" nylon washer
1/2"x1/4" nylon spacer for 1/4" screws
1) Remove the brackets from your old lift by drilling out the rivets with a 1/4" drill bit. Continue drilling to enlarge the bracket holes to 1/4".
2) Remove the bracket that came on one end of the 95237 lift by drilling out its rivet. Discard the bracket and the nylon washers that came with the lift.
3) Enlarge the holes in both ends of the 95237 lift tube to 1/2".
4) Assemble your old brackets to the 95237 lift tube using the hardware in the order shown in the attached picture. Note that the nylon spacer acts as a hub for the end of the tube to rotate on. It appears to me that this will stand up to a LOT of opening cycles. If the spacers ever do wear out, they are only 30 cents each to replace.
Your local Autozone should stock Mighty-Lift 95237 supports. This lift has the right gas tube but doesn't have the right brackets to bolt into an 80. I got them for $25.99 each with a lifetime warranty. You can reuse the brackets from your old lifts with a few minutes work and $1.82 worth of hardware per side from the bolt aisle at Ace Hardware. The attached picture shows a Toyota support compared to a modified Mighty-Lift support.
Tools
--------------------------
Drill with 1/4" and 1/2" bits
7/16" wrench
big screwdriver.
Hardware (2 each per lift)
-------------------------
1/4"x3/4" truss head slotted machine screw
1/4" nylock nut
1/4" flat washer
3/4"x1/2"x1/8" nylon washer
1/2"x1/4" nylon spacer for 1/4" screws
1) Remove the brackets from your old lift by drilling out the rivets with a 1/4" drill bit. Continue drilling to enlarge the bracket holes to 1/4".
2) Remove the bracket that came on one end of the 95237 lift by drilling out its rivet. Discard the bracket and the nylon washers that came with the lift.
3) Enlarge the holes in both ends of the 95237 lift tube to 1/2".
4) Assemble your old brackets to the 95237 lift tube using the hardware in the order shown in the attached picture. Note that the nylon spacer acts as a hub for the end of the tube to rotate on. It appears to me that this will stand up to a LOT of opening cycles. If the spacers ever do wear out, they are only 30 cents each to replace.