The Weber won't pass inspection in Cali. The Mikuni is a biatch to pull apart for the uninitiated - if you've never pulled down a carb, either this is the perfect place or possibly one of the worst (if you can strip and rebuild this thing and get the truck to run afterwards, you are well on the way to becoming a Mikuni master...) Main points of failure - accelerator pump diaphragm (easy to diagnose and relatively easy to replace even with the carb still mounted), secondary vacuum solenoid (again easy to diagnose but requires a little force to remove it from it's mount - not part of a kit as it's a large vacuum actuator), choke release assist diaphram (you'd never know if it's failed without visual inspection, causes internal vacuum leak - not part of a rebuild kit and there are 2 or 3 types of diaphragms with different actuator rods staked to them) and the biggie - water pellet choke assembly. Obvious when it fails (lots of greasy thick wax on the throttle shafts/linkages) does not come part of a kit, the wax pellet is used on Suzuki Sierra/Samurai and is obsolete/almost impossible to find and equally impossible to install. Some Mikunis have a 'rivetted' housing preventing the choke from being accessed, but the heads can be ground off the anti tamper screws and the threaded shafts backed out and replaced with regular metric screws. If you are going to do it, clean it thoroughly before removing it from the manifold, drain some coolant, take pics of everything then undo the nuts and hoses etc. Have an uncluttered work space with a tray so when you take the top housing off the fuel bowl/carb you don't lose the ball bearing and brass floats in the fuel supply gallery (you lose these - game over...) Do NOT mess with the adjuster screws on the throttle linkages. Once you start messing with these, your idle and choke will suffer.