The filter you need for all L-series motors is a Ford V8 filter. Napa filter number 1515. It's identical to the one "for" Nissans, but costs half as much.
Currently $6.29 for this oil filter
Napa filters are made by Wix, but with more filter element inside. Do not use Fram filters. K&N, Bosch, and Wix are also good filters at a higher price.
The classification of NAPA filters is as follows:
1515 = Gold filter (Best you can buy from Napa)
This carb when jetted down and used with a stock intake manifold will deliver very good torque and driveability with economy being reported from 22mpg up to 32mpg depending on gearing and driving habbits. With a ported intake and head or aftermarket manifolds, this carburetor can still deliver some good horsepower.
Most Weber downdrafts come with 135/135 jet sizes for primary and secondary.
This size is generally good for 1.8L to 2.2L engines. Installing smaller jets
will help a smaller engine to produce slightly more torque and economy on the lower
rpm range while taking away a little bit of top end power.
Here are some reference pictures of removing the top cover of the Weber to replace jets or fix the floats.
After removing the air filter. Lower air filter base comes off with 4 bolts.
Top cover off of carb. The floats hang gently on an arm. Bending this arm
slighly up or down will set when the valve closes that allows fuel into the carb.
Be careful not to bend this arm if you don't intend to adjust the fuel level.
Top cover comes off with 6 bolts and the E-Clip
removed from the choke arm. Fuel jets are at the bottom of the fuel bowl.
When purchased new, the Weber comes with a couple different options for
connecting the throttle cable. Here is how I set mine up. The throttle linkage
from the factory Hitachi carb will also fit the Weber if you choose to go that