440 source heads

[Tom J]

Hello All! Wondering what yall's thoughts are on the 440 Source stealth (single spring) heads are? Thinking of getting a set for a low compression 440. Looking to also replace cam...ideas? Have a performer RPM intake on motor now.
Looking for set up suggestions ETC.. Car has 727 stock converter and 8 3/4 sure grip with 3.73 gears.
Thanks for help in advance!

 

[68-500]

What year 440, 1967? If so I wouldn’t bother switching cylinder heads. As fat as camshaft I would contact a grinder like Jones Cams and ask for a custom grind.

 

[Sinitro]

Best Mopar wedge performance heads on a budget...

Just my $0.02..

 

[furious70]

I had Dwayne (PRHeads) brush up a set that I'm going to put on a 72 440 with a comp 501/510 solid and a gear vendor OD and 4.10's. I expect it'll run ok.

 

[matthon]

I got the dual spring heads on a bored 383, less expensive than rebuilding the 915s I was going to use, lighter, iirc flow better.

I ran it with an RPM intake for a bit, no complaints.

 

[Runcharger]

Decent upgrade I think. And man that's a great looking 66!

 

[RebelRider]

What did you end up doing? Anyone know if I would be around the same money reworking a set of 915 heads?

 

[RemCharger]

What did you end up doing? Anyone know if I would be around the same money reworking a set of 915 heads?

Yes. There's many different operations to rebuilding a stock pair of heads. Seats. Guides. Valves. Springs. Retainers keepers. Milling. Cleaning. Crack checking.
It all adds up fast

 

[PRHeads]

Yes. There's many different operations to rebuilding a stock pair of heads. Seats. Guides. Valves. Springs. Retainers keepers. Milling. Cleaning. Crack checking.
It all adds up fast

Add to the variables……. What the auto machine shop labor costs in your area are.

At my shop it’s not hard for the price of reworking factory BBM heads to exceed the cost of a pair of Stealths.

 

[Some Car Guy]

Used to be stock ones called Aeroheads that Indy sold that were set up with bigger valves and hard seats. Seems like they were like 600 bucks a pair and you could pick the casting number for 100 more. Not sure they did 915s. I haven’t seen a price sheet for several years though. Seems that ended with Covid.

 

[Gunner1]

I bought the CNC Stealths. Double springs and 10 degree locks. Put them on a 2355 flat top, .017 down. Isky 292 mega cam, 242@050 .500 lift, 108 Lsa, rpm intake, 750 Holley. 2800 stall, 3.73 gears and a Detroit locker. 275/60/15 tires. Mild idle. 750 hot in gear. Drives easy or boils the tires. Your choice. Flows about 280 at about .500 lift.

 

[68-500]

Add to the variables……. What the auto machine shop labor costs in your area are.

At my shop it’s not hard for the price of reworking factory BBM heads to exceed the cost of a pair of Stealths.

Maybe just me. But I think I would rather have the factory castings, probably 1 of few that think that way.

 

[RemCharger]

Maybe just me. But I think I would rather have the factory castings, probably 1 of few that think that way.

You aren't alone. But the guys that want the most bang for the buck are going to want newer better flowing heads for cheaper. Factor in time.. it's a no brainer.

 

[451Mopar]

The Stealth heads are good for the price. I did not use them out of the box, they were a bit dirty out of the box also, so need cleaned.
I did minor blending from the bowls to the valve seats and gasket match, the machine shop checked the valve guides which were OK, but did a valve job on them.
Used with hydraulic roller cam, so the springs were replaced with matching 10-degree retainers and locks.
They are way lighter than steel heads, and a decent replacement head. Pretty much the only aluminum heads that look close to factory heads.
They perform good, but if looking for all out performance, there are better heads out there.
Last year I bought a set of the CNC ported heads when they had a sale on them. Seems they were cleaned/bagged better, and looked clean out of the bags.
I haven't tore them down yet. Just getting started on the engine. Got the parts and now need to get a machine shop. The machine shop I used to use has closed.