full floating wristpins vs. pressed wristpins

I have two sets of high dollar Pankl H-beam rods out of a NASCAR RO7 engine and these are steel on steel non-floating rods... kinda surprised me, too.

So I talked with my friend Jim Watson (RIP) who was a crankshaft specialist for Roush racing for eight years. He confirmed that they run those rods non floating without a bushing in the Ford RY engines, too.... my rods show that heat was used to press the rods on and off.

My dirt 383 small block has bushed 340 rods...