If you're installing a Weber DGV series carb (whether new or used), you MUST jet it to your engine. Altitude differences, engine wear, ignition system, and driving habits all effect the proper jetting your Volvo will require. A must-have if you intend to get the engine running the best it can.
(We assume the use of four jets from the kit. If you keep any more than four, they are charged $5.00 each and will be deducted from your deposit, upon return).