It would have been nice if edelbrock had left out that intake manifold extension on the heads so we could run RB intakes on the B blocks. Not to mention it adds weight.. even the pro comp castings have had aluminum milled out of em to remove weight on the intake face. Better if they weren't made like that at all and just had the normal intake face, like the stage VI's and B1's do

But it's not such a big deal, Indy has a good low deck intake, and the heads are still considerably lighter than other 2 popular brands of big blocks

If you could post a pic of the whole chamber I'd appreciate it.
By the looks of the top of the head it does seem to be the newer style.
I had a set here that was about a year newer than yours, and I don't recall the bowls being that big, but I didn't measure them so I could just be remembering wrong.

On that set I had here, I cut for a 2.25 valve and just barely blended the seat into the bowl.

Lift------flow
.100---62.8
.200--117.1
.300--173.2
.400--224.4
.500--282.3
.600--330.9
.700--330.9
.800--341.0

The chambers are really tight on these heads, so a lot of work needs to be done there to bring up the mid-lift numbers.

Same head after being CNC ported by Hughes. This is before they had the 355cc program. Same 2.25 valve.

Lift------flow
.100---75.1
.200--164.7
.300--222.0
.400--278.6
.500--324.5
.600--347.8
.700--356.0
.800--356.0

Here's an early version MW head with the edelbrock valve and valve job, tested ootb-

Lift-------flow
.100---67.4
.200--141.3
.300--212.5
.400--259.2
.500--289.9
.600--318.7
.700--336.0
.800--348.3

I forgot to mention the newer heads had longer heli-coil inserts, I think 1" long. The old heads only had about 1/2" insert, so there was no threaded insert into the head area, just in the rocker tower.
I did not measure the new heads, but the old heads had bowls that were larger than the valve seat to where I blended the seat to the bowl to remove the sharp transition.

I seen this on their site:

Flow tests below show results from our SAENZ 680 Flow Bench

Lift / ootb in. / cnc in. / ootb ex. / cnc ex.

.100 74.4 79 63.7 77.9
.200 137.0 164 115.2 129.5
.300 191.7 245 167.4 183.8
.350 220.1 270 192.5 208.2
.400 247.8 300 212.5 234.7
.450 273.9 328 226.6 256.6
.500 293.8 351 234.6 273.8
.550 309.5 366 238.3 287.1
.600 310.7 380 241.8 296.4
.650 311.0 391 243.9 305.4
.700 316.4 397 244.9 312.4
.750 318.6 397 246.0 317.7
.800 322.0 406 246.7 322.4

I tried to search back for more info on my original set of heads, but the search only went back to November 2008. Edelbrock released the heads in March 10 of 2008, so I received my heads sometime between those times in 2008.
I got the Hughes CNC heads around Christmas 2014 when they has a 50% off sale.

I'd love to get one of their "monster max" 355cc heads on my bench to see how it compared to their older program.
Even if it was 10-15cfm less than advertised it would still be a pretty good head.

The early program flowed 356 on my bench with a 2.25 valve. If they found another 30+ cfm out of it, they definitely did their homework.

It would be interesting to see a dyno comparison between those and a set of Indy CNC 345's on something like an 850-900hp 572.

In that case maybe i won't have an issue with a single shaft setup if I use studs that thread down all the way. I guess I can only try and see.

I'll get more pics when I can, I can't right now. I will let you know what flow we get with a 2.300" intake valve and the heads cleaned up. Have a mopar head guru here who is very good, his porting on a couple of stage VI headed 440's were well in the 9 sec 1/4's, one only had a 590' mopar solid, no nitrous. 20 years ago now

By the time you correct the valevtrain geometry with ~.090 worth of shims a 3.5" stud with 1" of thread on each end will work for the two longer studs. I'd have to measure the shofter studs to be sure of their length.

My engine made 750hp with a 1050cfm, 4150 style carb, 11.2:1 CR, and 1-7/8-2" step headers, and solid roller ground for use with nitrous.

850ish seems doable with a new set of Hughes CNC heads, a tunnelram, more CR and caruretion.

If you do a serach I made a list of installed heights using different retainers and locks when setting up my heads.

One mo

Granted, it's a std port head, but I rechecked the bowl diameter.......middle of the bowl, down to about the end of the guide.....its only about 1.725-1.740 diameter. Right at the botttom of the insert its 1.970, but once you get past the seat insert, it's just filled right in.
By comparison, an Indy EZ head has the intake bowls at about 2.050 ootb.
That's where I ended up on the set of std victors I just finished.....only I had to remove .300 worth of material to get there.

With the edelbrock valve job and valve, using a Manley +.100 titanium retainer and std locks, with a .060 spring cup, the installed height is right at 1.900.

I sent my set of Max wedge edelbrocks to cncport.com and here are their flow numbers with a 2.25 and just a 45 degree on the seats. They used my heads to write the program.

Those are some good numbers.

I checked out their site, says they start out with a std port head and open it to MW size.
Is that how they did yours, or were yours MW to begin with?

$1200 is a pretty attractive price for that too.

That's a pretty good pic showing how the B3RE shaft relocation kits modify the "as cast" geometry. For what max lift is that particular kit configured?

Nope might need to call them, mine were the cast max wedge ports that they cnc'd. I've noticed they having changed the Web site. But the program is there

Very nice. Makes me wonder how hughes got such killer exhaust flow #'s.

750hp is very good with that CR and small headers. You might have 20hp gain just from using a set of 2 1/8" headers. Even more going to a single 4500 carb. I've put 1 7/8 full length 4-1's on an unopened LS1, tuned to the limit only, and it's a low 11's car (light car though). Small headers aren't better for any V8, maybe for a Datsun 120Y they give more torque.

Although im unsure of your cam size. Which brand rockers are you running?, and do they come with those spacers in your pic to correct geometry?

I was wondering the same thing, but not as much how hughes got the numbers rather that cncport.com exhaust flow numbers look low. Mopars old stage 6 heads the exhaust flow over 300cfm without much effort with the same 1.81 valve and the Victors exhaust port looks very similar to the stage 6

Can you give me a link to who sell that rocker shaft relocation kit?