Josh 89
yes you need "hardened" PR with guideplates. What you really should consider, beyond hardened if going NSA, is a PR with thicker walls like .080. You are building the "top end" and assumeing looking to rev more also....PR can flex especially at higher RPM's
TrickFlo is what I got but there are many options for PR's
now if by "top end" you are haveing heads "done" which would involve milling the surface, now going 1:6 RR and especially if doing a cam AND even more so if the block was decked you really need to confirm PR length
7.200" is stock but often after "motor" work involving heads/cam a shorter PR is often needed but you need to measure with a PR check tool to confirm
a quick check would be to mark the top of a valve stem with a sharpie, lash that valve, rotate engine by hand 2 revolutions and remove rocker. If witness mark is center and narrow you are good. mark closer to intake means longer PR is needed and further towards exhaust means shorter. Typically off the shelf PR come in .050 increments +/- lengths over stock. A measure PR tool will tell you exactly what you need.