Mopar Stage VI 6 heads questions

I apricate all the comments. I didn't want to make my first post a novel with all my background and my may of doing things I just wanted to see if someone on here could answer some questions about these heads before I start buy/trading for parts. I know I can mock up a valve and measure the clearance but I live in Michigan, my shop isn't heated and it's cold outside. Call me lazy or maybe I'm just getting old. Also my wife hates it when I start brining engine parts in the house in the middle of winter. lol

So a little about me and my way of thinking. I grew up on a farm where I learned to fix all kinds of things at a young age. Why did I learn these things, because when something broke my dad or grandpa would have to fix it and I wanted to learn how to do it. They couldn't just stop and say well I guess the cows don't eat today because the tractor will not start and you couldn't call the local tractor shop to come fix it for you because A, it would be 3 days before they could get there and B, because we couldn't afford it. My dad and mom were also car people from drag racing in the 60's - 70's to building hot rods, street rods and muscle cars up until my dads passing in 2022. My first engine rebuild was a briggs on my mini bike, I rebuilt my first V8 when I was 12, a 1955 Dodge 270 Hemi, my dad walked me thru it. By the time I was 21 I had completed my associates degree in Auto Tech and was a state certified technician. I have always tried to do everything I can on my own and over the years I have built everything on old cars from top to bottom.

I have always had to build on a budget unless I was building something on customer pay. I have never had the bank for a pro built anything. I have a family and farm that comes first and toys come probably 5 or 6 on the priority list so basically not much left over. I learned at a young age that some guys have their cars built and other guys build their own. I have always fell into the latter group, not by choice but by necessity. I would love to be able to go online and order 10K in parts, take everything to a shop to have a 1000HP engine built for the Duster but that isn't going to happen. So I have to use what I have if I can or sell/trade things I have to fund my project. So when people say just take the heads to a professional and have them build well I would if I could and I will if I find it is out of my ability to do it but then that will take money from something else.

So that's where I'm coming from, first try to use things I already have, second trade things I have to get things I need and three as a last resort buy new parts.

As far as these heads go I know I can't use stock stamped steel rockers and push rods with high pressure springs without either bending a push rod or pushing the push rod thru the stock rocker but I need to know if I need stock geometry rockers or offset rockers. Thanks to Bobzilla for the info on this, now I know what to look for.

If anyone knows what the max lift is on these heads using stock length valves and retainers that would be great. Or if someone has info like I ran a xx size cam but I had to use do xyz to do it that would also be helpful. If I can't get info on here I will in time measure for myself and report back.