I have a chance to pick up a nice 454 block locally. Standard bore 2 bolt mains 454 block, needs to be cleaned but what wouldn't need to be after sitting for a while. The guy wants $150 for the block and I have been talking to Pat at Nyes Automotive down in Muncie. I told Pat what I was looking for and he recommended a 496, he said he has built one before to the specs that I am looking at. I didn't get the specs of what cam or anything yet, he stated that he would use an Eddy intake, Eddy heads, a Quick Fuel 850CFM carb, and a mechanical fuel pump. He said I should be right around 525hp and 540tq when it's all said and done. My question is, do you guys think this power level is attainable on a mechanical fuel pump and 2 bolt mains on this block or do I NEED an electric fuel pump and 4 bolt main block? Any input is awesome.