A 351 is worth building even if it ain't stroked. I will put mine against any 408 even though I would get spanked. Put it this way, build a 351, if you aren't satisfied, make a 408 out of it. Then you will know for sure. Of course, you will make more power with more cubes in the N/A form. If you want a street car with some track duty, I would build a 351 with at least 10:1 compression. Slap some AFR 185's on it with a good hyd roller cam. You will be pleased. The other most important thing is it must have at least a 3.55 gear for a stick car and at least 3.73 for an auto. Some people will argue that point cause it is personal preference. Personally I like my 4.10 with my 5 speed. BTW, I am not claiming that a 2 piece seal is any better than a one piece. Like I said, the 2 piece is a pita to change. They both seal good and they both wear out the same. The older 351's had two piece rear seals and you would just have to live with that. Look at it this way, by the time you need to change it, you needed to put bearings in it anyway.
