I just went to the shop that built my stroker motor and here's the breakout of what I got.

4340 Steel Crank 3.4 STR
H beam rods 5.4L
Forged pistons
Molly rings
early block, studded & girdled
Scorpion 1.6 RR's

I'm upping the timing to 25 degrees and see what that gets me when I get it tuned again.

 

why 5.4" rods instead of 5.315"

 

Not sure. I'll find out.

What would the benefit be of one over the other?

 

The oil ring does not intersect with the 1.175" tall piston/5.315" rod.

You still get a solid piston and 347 cubes.

 

I went with the 5.315 rod too...it yields a better rod ratio and less possible piston rock in the bore..and no wrist pin intersecting the oil control ring

 

5.315"/3.4" = 1.56
5.400"/3.4" = 1.59

The longer rod gives you a "better" rod ratio.

Of course, that is extremely negligable.

We are not trying to squeeze out the last amount of HP we can, so it means nothing

 

Good to know and thanks for the lesson.