Nice thread i`m about 3 months from starting my 431 build I had the weights cut down on a forged 440 crank and got cold feet on whether to us it or buy a 440 source crank its been killing me.
I started with a steel 440 crank that had been cut down. But after noticing some less than stellar machining on it, I tossed it and got a 440 Source crank. The fit and finish is so nice, it's like artwork.