The Below Part Numbers represent what I changed before the SVX motor went in my Vanagon

Item Part Number Cost at Subaru Dealer Notes
Front Crank Seal 806733030 14.43 on seal NOK 2.2 BH3882G
Timing Belt 13028AA120 111.94 they gave me the wrong one the 1st time :(
Water Pump 21111AA033 133.80 big idler pulley makes this costly, water pump drives from timing belt
Water Pump Gasket 21114AA051 3.02 metal gasket
Thermostat 21200AA072 14.50 put bleed hole at top when installing
Thermostat rubber seal 21236AA010 3.94  
Fuel Filter 42072PA010 29.77 PT251892  Optional, you can use a VW one, I like the Subie one better
Air Filter 16546AA020 16.74  
A/C Belt 73013PA000 33.54 4 rib
Alt/PS Belt 809218210 20.10 5 rib 18x5.5x880
PCV 11810AA000 10.08  
Heater Hose 807611101 11.48 1 of 2 small water hoses coming from water pump, hard to change later
Heater Hose 807615131 11.48 2 of 2 small water hoses coming from water pump
OEM Heater Hose clamps 80592209   might be small or large one
OEM Heater Hose clamps 805918010   might be small or large one
Idler Pulley Timing 13085AA020 140.36 this is the one that faces the teeth of the belt
Valve Cover Seal 13294AA020 8.90 small center one surrounds 2 plugs
Valve Cover Seal 13294AA030 8.90 small center one surrounds 1 plug
Valve Cover Seal 13293AA011 8.90 small center one surrounds 1 plug
Valve Cover Seal 13293AA020 8.90 small center one surrounds 2 plugs
Valve Cover Seal 13272AA031 17.08 Valve Cover Left Hand
Valve Cover Seal 13270AA031 17.08 Valve Cover Right Hand
Rear Seal 806786040 13.36  
Oil Pan Gasket     no gasket!!! use sealer, as per dealer
Spark Plugs (6)     purchased from http://sparkplugs.com
Oil Return tube Seal 11122AA340 17.25 tube in oil pan that return oil to pan, seals to block
Oil Pressure Switch 25240KA080 17.70  
Intake Manifold Gasket 14035AA140 14.90 you need 2 of these
Exhaust Manifold Gasket 14038AA010 11.62 you need 2 of these
EGR Tube Gasket 14719AA010 12.12 small gasket with 2 bolt holes, all the egr tubes use this
EGR Pipe 14725AA091 58.94 Connects EGR to Header (mine would not release from stock exhaust manifold
Oil Filter      

Other Things You may Consider replacing (If cost was no option I would do, or i forgot to do these....)

EGR Valve      
EGR Transducer      
Oxygen Sensors (2 on ODB1) Bosch A24-A31 200 21142    
Valve Cover Bolt Seals      
Coolant Manifold Seals