So today I dropped my block off a the machine shop :devil::devil:. I need some help on deciding- leaving it a 355 or making it a 383. I'll be using the car as a daily driver but I also want to have that HP!!! The machinist said to leave it a 355 and it will last, and make it a 383 and it will last 6,000 miles.... Also said that 2 Bolt mains are better than 4 Bolt Mains. I thought it was the 4 bolt main that was better.....?