Mopar Stage VI 6 heads questions

Take the heads to a machine shop. They should be able to tell you when spring bind is and what max lift can be. I'm not sure about rocker offset. I believe stock port may be ok but you can probably throw the head on a block and drop some stock rockers on and see if they line up. I'm pretty sure the exhaust will be ok but the intakes may require an offset. I have MW Stg 6 heads. I needed offset intake rockers. A custom set of pushrods are a small price to pay for proper length and function. And you didn't say but obviously different style lifters will need different length pushrods.
And I think you are leaving a lot on the table by running them as is. At least have a shop disassemble and do a minor clean up. It's worth it.