In my opinion it's not foolish to spend a little extra dough on better parts that are stronger and made to last. My personal experience with cast Pistons wasn't good so I will not make that mistake again. You may have better luck but how many times do you really want to pull that motor because the ring lands broke out from too high of compression or detonation that you didn't even hear. It's your money and your effort but it would be a shame to see that numbers matching block go to [censored] because of a few extra bucks that were deemed not worth it. Your motor. Do what you want. You asked.