No downside to to much line. Beer will simply flow slowly. Be certain with your temperature - 36F @ 15 PSIG. Bud light has the same carbonation as 80% of beer so theis pressure should work fine.
During the pour, the initial shot of foam should be dumped out and then dispense a beer. It is impossible to pour clear beer on top of foam. Try this. And keep the glass away from the faucet so you can see the flow.
Scott Zuhse, Instructor
Micro Matic Dispense Institute