In 2011 I was able to find an old marine SBC 350 motor. The block was a .010 high nickel casting with 2 bolt mains, perfect for my mild performance build. Block was bored .030 in and fitted with a new Scat cast crankshaft. I used Speed-Pro Hypereutectic flat top Pistons and fitted them to the original rods. Whole rotating assembly was balanced at R-Koneistus in Kerava, Finland.