Edelbrock heads.

Ooops, my mistake..... I thought you just made a error when you listed 60179 and meant 60779....which is the 63 cc closed chamber type. So yes, you could run a piston like the KB243 or similar piston with no changes to that head or no milling on the piston top. But the 60179 is not 'open' quite as much as the stock type heads... those stock heads have a flat area that is typically about .090" deep. Maybe mill off the 574 heads .020" to .030" and the CR difference would not be so great when you change heads. Check on the spark plug side too for piston to head clearance.

It is my view that changing the pistons 2x is just a pain in the rear and certainly a chunk of extra $$... if you are going to do it carefully and measure and setup things properly, then it takes a fair amount of work, or more money to pay someone else to do it. The obvious question: Why not go straight to the Edelbrock heads now?

As noted above, the 60179 head even with a .028" thin head gasket loses the advantage of quench. You end up with .070" or more piston head to cylinder head gap, which is supposedly too large for effective quench action. I personally feel the addition of quench is a good design choice for keeping CR up with a smaller, torquier street cam while aiding to fend off detonation; that was the driving reason that we went with the 60779 heads.

As for domed pistons, do you have anything in particular in mind? I just don't see why the need to go with anything truly domed for mostly street use as the CR's typically will run too high for 93 pump gas, unless you run a fairly big cam.... which goes against low end torque, cruising, etc..

Do you have a particular ET or other performance goal for those times when you go to the strip? That may drive a few more parts decisions.

BTW, FWIW, the stock 340 pistons stick out of the block by .018", not .090-.100". The KB243's mimmick that .018" + deck height.