Edelbrock heads on a 340 with KB243 pistons

I don't have the Edelbrock open chambers, that would make things incredibly simple. That's page 55 in the Mopar engines manual 8th edition around 1991. I went back to my Direct Connection book from 1976 and it didn't even mention piston to head clearance. I just put that on here to show how stuff has changed over the last 20 or 30 years, I wouldn't take anything in either of those manuals as gospel. I'm guessing they recommended the wide clearances because they knew they were dealing with novices or inexperienced engine builders, anybody who builds engines for a living isn't cracking those books open. I also found it amusing that there is no mention of quench in there. I've already figured out how to get either .033 or .042 with off the shelf gaskets, just waiting till I go out and verify how much positive deck I have.