Set of 64 426 Hemi heads, looks like they have been milled a lot. Says the thickness of the heads between the head deck surface and the head bolt surface for the middle row of head bolts is 3.590 on one and 3.600 on the other. Intake side has been taken down pretty hard too. Any way to find out how far they've been taken down from stock?

Yes,measure the chamber depth (to the deck) in the center of the chamber.The spec is available in all the old Mopar books and tune up tips.May be in the tech archives here.

Having trouble finding that spec online. If anyone knows it, please let me know.

i have in records that an uncut head thickness is 3.675

just cc the chamber

just seen,, you have k heads,,, numbers may be different from a 559 head

what are you using them for?

many guys cut the int face much more than the deck,, to compensate for cutting the block as well

Was just wanting to use them for a 600hp street machine type build. Trying to figure out how far the deck has been milled because the intake side valve cover rail looks to be at 1/2 it's original thickness.

unless you have a 64 car,, go buy some stage v heads,, sell those to a restoration guy....

i said before,, guys cut the intake flanges more than what they should have for how much the deck of the head was cut,, if you had a crossram and you cut .100-.150 off your block the only option you really had then was to cut the intake face of the head

Liston to Jeff <modernj cyl hesd> you know he's in pre med or is it pre law lol.Good talk we had this morning Jeff.

Yeah, I would say get rid of them and get good ones.
All sort of issues hard to come by: intake bolts do not fit, valveseats sticking out are cut, then valves are sunk, then rocker geometry is wrong, then interference with valvecovers, if you put on extra valvecovergaskets the sparkplug tubes are too short etc, it is really an endless nightmare and the absolute opposite of blueprinting. Gosh a Hemi can be screwed up by all jobs done to it in its earlier life, the shortblock can be equally bad (by multiple line-honings)
I am assembling a Hemi now with new block and heads, and it is like a sweet dream. It is a good mock-up instead of a bad fcck-up.
I would say, that is a good investment, and will really cut down on working hours, not to mention the degree of quality you gain.
My

I have a drawing on the 3614433 aluminum head and it shows a dimension of 3.68" from the deck to the rocker stand pad. Nominal chamber depth is 1.34". Attached is a quick drawing I did on the basic chamber shape. I was trying to see how much cc's would be added if I machined the R.25" to the full radius. It was less than 1cc added.