I hear a lot of people dissing the 351M/400 family of engines- but IMO they are only a raised deck Cleveland with a larger 3"main bearing. What's the deal ? I see no reason why a 400 would not be a good street or race buildup- how "bad" can 50 more cubes be, with the same top end equipment ? Every time I hear someone knocking a 400 for being a slug- it makes no sense to me. Any opinions and info welcome !