Trying to figure out what 427 LR heads will flow

[FERoadster]

I've got a pair of LR heads that are the over the counter variety C4AE H with the pad of dots instead of 6090 -  Cast date 6K31.
I'm wondering what they flow, these are not ported.
I searched the FEForum and came up with flows ported but came up short in stock configuration. Would  someone point me to a thread either here or on the FEForum?

Thanks   Richard >>> FERoadster

[blykins]

Somewhere around 230-240 cfm.  Stan Weiss may have some on his head flow page, but the last pair I used, we ported them and gained 40 numbers on them.  They ended up around 280-290 cfm if I remember right.

[My427stang]

Somewhere around 230-240 cfm.  Stan Weiss may have some on his head flow page, but the last pair I used, we ported them and gained 40 numbers on them.  They ended up around 280-290 cfm if I remember right.

Brent is right on the money, every set I have had was right there, and the right guy can get 280+ depending on the money spent.  Not sure what you are building, but keeping a med riser intake high on the port works well too, pulls the charge in at the top of the port where it can go fast around the turn

[FERoadster]

My plan is to use these heads on a 427-454 build. Arias Pistons but the heads have HR valves 2.17 intake exhaust? I'd have to look but HR exhaust as well.
Intake will be an Edelbrock 6X2 reworked by JDC.

Richard

[My427stang]

If it were me, I'd likely port the heck out of them and run a 11/32 valve intake and exhaust assuming you are already buying guides and valves  Likely a 1.67 valve is plenty, then use a 2.15 or even a 2.19 intake.   You should be able to break the 300's without butchering the head.

I'd defer to Joe on what the 6x2 will breathe, but my guess is that the heads won't limit you