Are Indy EZ heads a "replacement" for stock heads as do they use the same headers, intake, rocker arms etc.? I know a guy with a set, I'm unsure of which model of the EZ heads, but he has the heads and intake along with some other items that he wants to sell still new in the box. I'm looking to upgrade my heads to replace my 440 stealths but want to be able to use my TTI headers and rocker arms etc. How do the EZ heads compare to the 440 CNC Stealth and the new Trick Flow heads?

Depends which "EZ" they are. If they're a standard or EZ-1 - no problem with stock hardware but if they're a set that specifies CNC port volume then they need offset rockers.

You'll need the Indy valley cover if you buy those heads - specific to your block - B or RB.
Intakes are interchangeable but you may as well take it with the heads if the price is right.

My guess is he bought the "kit".

As above - the EZ's are a standard port and the EZ-1's are a MW port but have standard exhaust location and use standard rocker arm set up I think they are a great head. The BIG EZ's are the ones that need off set rockers.

EZ-1 is a max wedge port - not all intakes will work

If your looking to stick with a standard port - the trick flow is the best head out there right now - The standard port EZ really is an under performer with the stock port configuration when you compare to the edelbrock or trick flow

The std port EZ....... A head that gets no love or respect.

For sure, the TF 240 is the best bang for the buck for a std port head, and if you're going to compare them to the EZ's in ootb form, then the TF's would certainly come out on top.
However, properly prepped the std port EZ has very similar flow to the TF 240, and is an easier head to make into a true "MW" sized head, because.....well, it is a MW sized head.
It just has the port entrances shrunk down to std size to accommodate a std manifold.
If you have to run a std port manifold, you can fill the lip at the roof of the port where it transitions from std to MW size, and you get another 15-20cfm out of it.
Prepped, std port opening, roof mods, the heads out flow the TF 240.

Also, as the cubic inches grow, the added intake runner volume of the EZ could be exploited........ And at "higher" hp levels with stroker builds, I feel the EZ's bigger exhaust valve and more generous exhaust port would start to pay off.

The biggest advantages the TF 240 has going for it, is a high level fit and finish, full porting ootb...... And the real biggie...... The price.

My gut feeling is, on a typical 505 street/strip build, with enough cam to exploit the potential of the heads, something like the Hughes "super prepped" std port EZ's(which have the roof filled in) would make more power than the ootb TF 240's.
The "problem" is, they're going to cost at least $500 more than the TF heads.

Only issue might be the spark plugs. EZ plugs are angled while the Stealth are straight. Your TTi headers should fit the EZ heads but double check on the TTi website to be sure.

If the EZ kit that your buddy is selling is priced right then it could be a good deal for you. You'll also want to double check compression ratio since that could change. The EZ heads have a smaller cc size than stock heads.

Rocker arms should swap over as long as the heads are not the Big EZ version.

I run a set of massaged standard port EZ's. The 2", E-Body TTI's fit nicely. FWIW: They ended up with a 78.5cc chamber, and the block has a pair of small cylinder bore notches to unshroud the valves. The head gasket is a Cometic 4.5" bore to clear the combustion chamber shape and notched bores.

I'd listen to this guy !!

I thought the C&C 440 source & trick 240 where about the same flow ?

They are.

Even if they are (haven't flowed a set of either myself to compare), the TF's combustion chamber design is far better than the CNC'd 440 Source / Edelbrock Performer RPM / Sidewinder style. "It ain't all about the flow..."

Absolutely.

It would be neat to see an cnc Eddy vs. cnc Stealth vs. Trickflow 240 dyno test.

Yes!!

The E-head and the Stealth are functionally equivalent, with the exception of angled vs straight plugs. It would really only be one of those two vs. the TF head.

So, which one of you is going to pay for it?

This, and isn't the volune/CSA of the TF less than the other's in CNC configuration? If so, I would think that would make for a faster car, maybe?

And aren't the TF a little better at low lift unless you put a 2.19 in the other heads.

Are the Trick Flows worth $2000.00 + head gaskets, pushrods, better than what he has now, to MAYBE pick up a little more power. ?

Well, the OP seems to "want" to upgrade his Stealth heads, but I didn't see any info about the overall build...... Which really should be considered when trying to determine if replacing the Stealths is the right move, or if having them ported would be an effective alternative.

Again, that was not the question.

I use the basic EZ heads that Dwayne Porter sold me and he worked them some for me at a very reasonable price. I like the fact that it uses the stock oil flow to the rockers and the stock type of rocker setup. And with the exh not raised my 2" TTI headers fit like a glove. No problems at all with plugs using the EZ heads and 2" TTI headers as there is plenty of room in my 63 and the plugs are easy to change as long as the headers are cool. Thats one reason I liked the EZ heads I used as they did not need any trick things like offset rockers or external oil lines. I wanted a nice simple setup so it would not kill me in cost. I am very pleased with the EZ heads I am using as they work fine for the basic combo I wanted. Ron