one 044 pump can supply enough fuel for any T34 by miles,even on standard fuel lines

IF they are tired and worn it would be good practice to change them for new ones,but not to gain anything other than a smoother flow.

using 2 pumps at that power level would create more hassle than it's worth to be honest.

I run one 044 pump,with new aeroquipped lines at around 420bhp,and they will be fine for at least another 100bhp as they are (pump and lines)