Quelch pad and closed chambers

I'm building a 470 with Indy closed chamber heads, I bought ICON 1.480 step dish pistons (I thought they were just dished). Do I have to remove the 0.005 step in front of the piston to install them if they clear? The step will put them at deck height if that matters. Yes, I know I have to "dry" fit the pistons to check clearances and how much clearance do I need?

Put a .039 head gasket on it, should be good, but check it.

Thats what I was going to do but wanted to make sure. Gotta steal the kids play-doo, hehehe

Dont know if I am just misunderstanding you but I always install my 4 corner pistons without the rings and do a deck height check on each piston. Once you know your true deck height you can work from that if your heads are closed chamber. I mean perfect is zero deck and then just use the .039 head gasket as long as the flat (highest part of the piston) is zero deck not the dish. Or did I read it wrong ?

Yes you are correct... The quelch pad should be 0.001-2 below deck but I wont know till I dry fit every thing.

http://thesaurus.com/browse/quelch

http://www.merriam-webster.com/dictionary/quench

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Yes you are correct... The quelch pad should be 0.001-2 below deck but I wont know till I dry fit every thing.

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Make sure and rock the piston from the cam side to the outside( I use a thin narrow straight blade screwdrivers between the cylinder wall and the piston stop to raock and hold the piston as I measure, you can push it over also but not sure taht it stays there like it does when being held by the screwdriver blade) amd measure the piston quench pad hieght at both levels I've seen as much as .020 difference that way EDITED Make sure and check the deck hieght on all eight pistons, on all the motors you do It gets real aggrivating when you used one piston and rod to set the deck hieght with and then find out later after you checked all eight deck hieghts that you have rods that vary .013 in length