Originally Posted by 351freak
I am interested in knowing more about the 302 rod/351 crank set up as I am in the process of deciding how to build up a clevo for my XD.
Is it a stroker? What advantages does it give?
I don't think of a 302 rod with a 351 crank as being a stroker, but it is in every essential way. I think of it as a "different sized rod" 351. There is no reason why it isn't a stroker 302, but I'd generally term the concept of a stroker as being a block with a larger than "factory produced" stroke.
We never had a 302C. All of our 302s were 8.2" deck Windsor-style small blocks. These are well-stroked at 347" and they are small packages that pack a serious punch. My 347" stroker made 520 HP.
With the same block used for the 302 and 351, I think of the 302C as a "destroked" 351 and a 3.500" stroke simply as a 351. The addition of the longer rods is a relatively minor difference. If you could, you might want to consider sourcing a set of 5.778" 351C rods as they can't be terribly expensive. Here, we throw them away or at most charge $20-30 for a set of used factory rods that need reconditioning. Of course, this is a lot of extra work if you don't have factory sized 351C pistons, to go with it, too. I like the shorter rod 351C design, but I regularly recommend the shortest rod that gets the job done, but nothing wrong with the 302-rodded 351C, especially if it works for the budget. I'm just not sure that I'd call it a stroker.
The advantages of using a 351C crank over a 302C crank should be obvious. An additional 49 CID or a 16% increase in capacity. I'd venture to say that there is no engine-specific advantage in using the 302C rods, but if you've already got them then you're money ahead in the game. I'd recondition them and use them.