Thought on a magnum build

I'm building the 5.2 now, well I sure hope that's not the case uempistons.com shows the product to fit a 5.2 magnum and can be either pressed or floating, not saying your wrong just stating what the website says.
pressed or floating makes no matter. it's the width of the rods/pin boss that's going to be of issue.

you have the pistons in hand? measure them and find out.

you can't always trust what's listed, sellers make mistakes all the time. trust but verify, always.