Will you do something to block the std head oiling so you don't over oil the top end?

I'll watch it first to see what happens and then go from there.

I snapped an ARP head stud today while putting the heads back on. I was only at 70 ft-lbs on the torque wrench when it snapped. Never seen that before. Got lucky, the stud came out without any problems so I just need to order some replacements and keep going. Very weird, maybe a defective stud? I've re-used studs in the past multiple times with zero issues. Not sure why this one broke.

I had that happen to me last year I just ran a tap clean up the threads some

Wait! Do I see an OE type valley pan in there???

That is odd cos I`m running the 1/2" main studs from my 360 from 14+ years ago..............

That would be an older photo, Andy just showing the clear valve cover.

Ok so if I have all this right:

1) the exhaust port is in the same location.
2) the head is overall taller than say an Eddy RPM.
3) The rocker shaft is moved up.
4) A Hughes Rocker lines up with the valve tip.
5) They have more potential than a fully ported Eddy RPM.
6) Sounds like you can use a 1.6 or 1.7 ratio rocker

Will 3/8" pushrods fit with higher ratio rocker and not require clearance ?

Thanks!

3/8 pushrods fit fine. Here is a picture of 7/16 pushrods on my head with the T&D rocker arms. Looks to me like 7/16 will also work but it gets tight.

These T&D arms are basically a 1.65 ratio. The cam lobe in the picture above is 0.445 and I'm getting .727 gross lift (zero lash). The 7/16 pushrods rub slightly in a few spots. Not sure if I'll run them or not. I don't really want to shave a bunch of aluminum into the motor so probably safer to run the 3/8 pushrods.

What is the advantage of the ball/ball pushrods?

You would need to ask T&D but my guess is they would say that it provides more clearance. The cup on the end of the pushrod can really eat into the rocker arm on a high ratio arm.

Looks like 1.633 with full spring pressure(around 650-700lbs with that spring)..... Pretty good!!

I think these springs are around 750 lbs over the nose. They were 290 on the seat and 636 lbs/inch so math works out to 752 lbs. A little stiffer than what it said on the box for whatever reason. I'm seeing about 0.030 deflection for some of the rocker arms but the T&D design appears to be pretty stiff.

What spring are you using? PAC? model number? FWIW As far as what ratio the rocker is verses what the manufacturer says etc. I call it mathematically whatever it winds up being as determined by the checker springs in relation to the cam lobe lift and lash. The as assembled 'real' spring just identifies the deflection which I have typically seen .025-.030" on springs around/above 800lbs. it is what it is I guess

We went to Dyno today. 511 flat tap solid cam, M1 intake, Holley 950 XP, Hughes 1.5 rockers, 2" exhaust.

How wild a cam, if you don't mind sharing

Don't mind at all.

wow ,
a lot of cam . what was idle speed ?
How long did it hold up after peak HP ?

Tex

I ran that cam in my 500" and it didn't peek until 6800, shifted at 7000, now I've got the smaller 23-633-5 it peeks at 6400. Your cam is to big if your only going to 6200.

As a note mine has 915 heads 2.18/1.81 25.5 cr and made 645 hp and 620 tq on E-85. Is 40 hp worth the cost of the heads? My junk has been together since 91, if I was starting over I would go with them, but I have a lot of parts to use up.