351 block questions

That be an R block, there is alot of work that need done to that block to use it. You have to finish all the bores including the lifters and crank line honeand the decks.

Anything you can make a 302 block do, a 351W can do it that much better, and safer. Think about the people on here with 347's hitting 500+ HP. A 351W can handle this easily without even stroking it.

Until 1974 the 351W had a respectible amount of nickel content. These are the most desired blocks. Not that anything after is bad, just not as strong. The other thing is the roller setup that changed the blocks in the early 80's. You have to choose your medicine unless, you want to modify the pre roller blocks into a roller setup. Any stock block can handle 600+, but you better have the guts to go with it.

i believe that also the 1969 to 1974 blocks had a shorter deck height and is better for more compression but will need addition machine work done for a stroker (notching the block but for a 408 this may have to be done anyways)

the roller blocks for a 351w didnt come out till around 1995 if i remember right. some before that came prepared for roller lifters but actually had flat tappet lifters. and again i dont know if maybe there ones that prepared roller but came factory with flat tappet would still need some addition machine work to be made roller. i have an 89 model block that i will be installing retro roller rockers in in the near future