Fuel PSI

Well put a gauge on her today and almost 4psi,so the fuel pump is working correctly. I can let it run for 40-60 min at home,take her out on the road, and it floods out. I think the carb is just too old to repair. Yea, i have had this thing apart at least 20 times,it's put together correctly,not only by me,but by my buddies,and it ain't working. Gas tank is vented,needle and seat hold,everything brand new inside carb. Put a load on her down the road and she floods out. the only thing it might be,if the floats were sticking somehow under load,and there is no way to duplicate that sitting in my garage. So will probably hold my breath and buy a reman carb,can't be any worse!!!!