Also, I believe the 331 is a higher revving engine(higher rpms where a blower makes more power), the 347 has the torque down low. I've yet to start digging in the mags, I will though.
Something that struck me as funny... Keith Craft suggested I not go with a windage tray, I wanted one. They told me that the little extra hp it gave didn't justify the loss in block cooling. They said that the windage tray cut down on the oil splashing against the block and that the block needed that. I thought that was odd but I took their advice.
