dont you mean "no more" than 4 lbs rob?
10lbs will most likely be blowing straight past the needle and seat, down the carbs into the exhaust, and past the rings into your oil...
depending on how much the electric pump flows your motor might be happy with as little as 2-3 psi...
I ran my fuel hungry 2276 on 3 lbs through a stock fuel line for a couple years before i upgraded the fuel system, more in Paranoia than anything else