does canfield make a head for the gm 496:party-smiley-004:

Yes, they have heads that will wake up that 496 ! Less expensive then AFR and Dart. Made in Ohio, great head, thick deck and flows better then AFR, or Dart !
Canfield has been around for over 20 years making awesome cylinder heads. Call up Foxwell Motorsports, he helped develop the head and sells them also.
You can not go wrong with Canfield heads.

Proof please that in an apple to apple comparison a Canfield will outflow an AFR .

You need new cams, call me

I thought Canfield heads went out of business??? I remember people having issues with them cracking years back??

110 degree seperation... Only with a dry exhaust.

+1 lsa 112 min

Pull the heads and inspect the guides and chamber. It could be just a bad guide job ? Cant say without looking at them. I would definitely get a new cam if you are going to use wet exhaust. Foxwell would be the guy to help you on the heads and cam. since he well versed in both Canfield and marine.
As far the heads cracking. Yes, the Canfields cracked under extreme pressure and usage around the lower exhaust head bolt and rocker tip. But these were heads running 1000 pound open pressure springs. Which is extreme mountain motor stuff. I do not think that will be a common problem here. Yes, they are still in business just building heads for other people. they do not really advertise. I guess they have the clients always ready to buy from them. From top builders to us. I know Carl Fultz and a few other top engine builders used and are using Canfield. they will stamp their name on them and port them.
I think for flow numbers, the AFR 315 cnc ported flows about 380 at .600 lift. Canfield 310 flows about 386 at .600 lift out of the box as cast. A light port on Canfields produces over 400 on mid lift, not .700 lift. For more flow numbers please contact Foxwell Motorsports since he has way more experience and can tell you about comparing head to head.
Now Canfield has released some updated old versions. The new head will be out this spring. Both heads have addressed the extreme pressure breakage issue. the new heads will be even better than the old heads.
I like them for the flow characteristics, you do not have to heavily port them to get good flow numbers. I did see in Foxwell website ported a 310 which supported 800 plus horse. not bad for a head under 3000 assembled. Everyone has different tastes and like different things. That is why we have choices to suite everyone.

No disrespect to the OP but rtc74 where are you getting all this information on Canfield heads? Out of the 1000's of threads I have read on forums about heads I have never heard anyone say buy Canfields over AFR, Dart or Brodix on a BBC application. Shoot you can't find any info on them in Google.
Good to see another head company in the mix.

I spoke with Mr. Foxwell today about Canfield heads. I have used them before on various applications years ago. Back in the day, when I talked to Carl Fultz and other big engine builders they suggested Canfields. Unless I was building a major huge motor, like a pro stock motor. They were able to get better numbers from Canfield. That was my experience, and it will vary from builder and person.
If you want more info look up Carl Fultz enterprises or Carl Fultz racing, and Foxwell Motorsports. Canfield make the heads For Carl Fultz. I know these guys still use them. The flows can vary, since different people port different ways. This could go on for years.
All the heads you listed are good heads. If you give any of those heads to a good porter you will have good results. Some guys only use Brodix, or AFR or Dart. Any head can be ported to outflow another head. All depends on who you talk to. Everyone has different tastes and experiences with cylinder heads.
I am glad we do have options to choose from. It would be a very boring world with only one option.