M38A1forlife

electrical fuel pump it has, and It makes a real loud cracking noise when I turn the key on and it still makes the noise after the engine is turned over. The whole system was converted to twelve volt, starter, distributor w/ external coil, altinator..all of it. Through research Ive found alot of people say the 12v system has given them problems everyone recommends the 24V system. I got the Jeep from my dad but whenever I ask about it he gets all mad and tells me theres nothing wrong with the 12v system, and if I want to go waste my money thats fine......but my question is that if its not a good system is it really worth it to keep going through these little problems or should I just decide to caugh up the money and buy the original set up? I want to but I feel like Im NEVER gonna get to drive it.