So i took out my 74 260z for a drive after finally installing a new starter, I got it started and it ran well, There was a groaning noise coming from the front, i said i was going to order a new water pump as soon as i got in for the day. I took it for one last drive about 15 miles when i started making some real loud screeching noises, then the pump went, on my drive way about 200 yards from the garage.... but the pump shattered and i took the radiator out and the guy at the shop said he would have to cut out about 10% of the radiator, but he said that the car should run fine... should i get a new radiator or use the old one with 10% less capacity?