Stealth heads are a great improvement over a stock head and very affordable. They can easilly be ported for more flow,

Just dont make the mistake i did of sending them to KG engines for their CNC porting , they came back butchered. [censored] porting,spring heights not properly done and worst of all they ruined the valve seats. Owner gave me every excuse in the book and never re imbursed a penny of the $1500.00 i paid .

Lesson learned, never deal with KG engines again and make sure no one else gets taken like me.

I have a set of 440 source cnc heads I bought from a member here years ago. Times got tough and I sold them to the guy who bought my old 68 Chrysler 300 20+ years ago. Last year I bought the Chrysler 300 back from him and bought those same cnc source heads from the mechanic he sold a motor to that had them on it. So in the next month my old heads are going on my old car with a fresh 440 and the comp xe274 cam out of the motor the heads were on. Not a race car by any means but should move the old c body pretty well even with 3.23 gears. The car does have a nitrous system for extra giggles.
I look forward to finally using them after all of these years.

Ootb Stealths Flow right around 260 on my bench.

Recut the seats, back cut the valves, blend the bowls and SSR, they’re basically right at 280.

Whittle down the guide boss, open the pinch a bit, relieve the chamber wall adjacent to the intake valve....... puts it right at about 290.

I suspect that from that point, increasing the size of the opening to MW size would be worth less than 10cfm.

The set from the pic below went on a build that was going to be using a factory x-ram.

Modern did mine max wedge size. Gave me a flow sheet at 348 cfm. I was trying to keep my 512” max wedge looking stockish. So stealth heads were my best option.

I’ve been very happy with all of the parts I’ve ordered from 440 source. I had one issue with the lightened crank. They thru drill the end of the crank, and install a freeze plug. It leaked oil out the back of the crank after I put it in the car. Had to pull the trans to fix it. Not the end of the world.

Those are some impressive flow numbers for a short valve head, love the look of that engine compartment!

How does it run?

Thanks

It hasn’t been to the track yet. Mostly just a street car.

Old engine was a high compression 413 max wedge, and the car went 12 flats. But I got sick of having to go buy race fuel.

New stroker is pump gas friendly, and has way more power. Stroker didn’t like the old “J” converter that I had in there. seemed like it was driving through it. I recently put in a tighter TCI converter and it feels way better. Might get rid of the 4.30 gears too, the bigger engine doesn’t seem like it needs them as much as the 413 did. When the track opens back up in the spring I’ll take it and see what it runs with the 4.30s, before I mess with them though.

Still not sure on the cam either, nobody had cores to cut a cam when I was putting the engine together and I was kind of in a time crunch. I bought a used roller off of eBay, and stuffed it in there. Runs good, but I’m not sure it was exactly the right specs. It was what I could get right then. lol

Very cool car!

I would imagine you have to sit in the back seat when driving - with the length of your legs and all.

I should’ve gotten a C-body….

Who is this?

I reported your flow numbers a while back during another discussion.

Seems some people didn’t believe me or the flow numbers.

Yeah, that’s the numbers I was given. That’s all I know.

I’m happy with them, I wanted to keep it looking halfway stock under the hood, and was going to open up the intake ports myself to max wedge size, until modern told me they already had a file for that on stealth heads.

By comparison, a nice stock legal set of Stage 3 MaxWedge heads with a S/S legal valve job flowed 278 at .700”, standard valve size.

Do you happen to remember what unported stage III heads flowed? My old engine has untouched heads on it, after I pulled it out of the car it got rebuilt and stuck in the corner of the garage. It ran good, but nothing like the new engine. I’m sure my dad or I will come across some car to stick it in.

The numbers I mention above your post are unported MaxWedge.

Very cool build and engine compartment looks super clean with nice retro features. Always loved the 62 Dart.

So I went and pulled my MCH data comparing CNC “std. port” and MW CNC w/ 2.19.

The MW w/ 2.19s was about 11 cfm better @ 0.200”, 0.300” and 0.400”, 7.5 cfm @ 0.500”, 6.5 cfm @ 0.600, and 3.5 cfm @ 0.700”.

I assume the low lift improvement was due to the larger valve.

There is a black 62 dart roller for sale in k falls.

On topic, does anyone currently offer a MW program for the Stealths? I have a set that needs some love.

I take it the std port CNC port still had the 2.14 valve?