440 Source Head Opinions?

-
Troub

Troub

67 Dart 270, 225 slant six
Joined
Jul 25, 2018
Messages
538
Reaction score
125
Location
Florida
Thinking of replacing the stock 516 heads on my 65 donor 383 engine that will be going in the 67 Dart. Any opinions? Thinking of keeping the bottom end stock.
8CA7A81F-E990-479A-AFF7-E320FF909224.png
 
You sure can’t beat the price in today’s market. Are there better, racier heads??? Heck ya, but I would never spend a cent on stock heads for a build like you are doing. Upgraded heads with some room to grow.
 
pittsburghracer said:
You sure can’t beat the price in today’s market. Are there better, racier heads??? Heck ya, but I would never spend a cent on stock heads for a build like you are doing. Upgraded heads with some room to grow.
Click to expand...
Yeah, unless I read it wrong, edelbrock heads are running close to $1000 each!
 
Very hard to compete with Stealths for the price........for the mild hot rod type build.

Depending on what the machine shop costs are like in your area, and the condition of the OP’s 516’s....... it’s pretty easy to spend over $1k refurbishing the stock heads.

Real world flow numbers for an ootb Stealth are about 260/176@.500 lift.
 
I haven't checked lately, but the Promaxx were about equally priced and the E-streets just a tad more than both at last I checked
 
Any AL is better than 50 year old cast for improvements. Do your homework and check your **** when you get it.
 
I just checked the Promaxx site.
For the BB Mopar assembled head, they only show it available as either bare or assembled with HR springs.

The flow data “tab” wasn’t working either.
 
Huh.
Add that to the growing list of stuff that doesn’t seem to work on my phone anymore.
 
Last edited:
cookietruck said:
Jegs shows them to ship in roughly two weeks "pending manufacturer availability". I'd call Promaxx and ask if they have castings in stock. I'd be surprised if they do..
Click to expand...
440 Source has TF 240 heads in stock, they are more expensive but a much better head. I ordered 2 and they we delivered in 2 days.
 
Troub said:
Thinking of replacing the stock 516 heads on my 65 donor 383 engine that will be going in the 67 Dart. Any opinions? Thinking of keeping the bottom end stock. View attachment 1715886357
Click to expand...
Got the 383 pulled out of the 65 Newport today. Fun time but darn cold here in the Florida Panhandle! Will see what else it needs besides new heads. The 67 Darts new heartbeat!

78F74C14-5AB4-4552-BB18-F1B6D7AFFAEC.jpeg


C63E7FAA-7A81-4609-A378-19BC6E74931B.jpeg


3777860F-DA6C-4F4B-B401-8227FB531541.jpeg
 
Edorion said:
440 Source has TF 240 heads in stock, they are more expensive but a much better head. I ordered 2 and they we delivered in 2 days.
Click to expand...
Whatcha putting those on Edorion?
 
mcodecuda said:
You will need to notch the cylinder bores if you use any of the aftermarket heads on a 383.
Click to expand...
The Trick flow, Edelbrock, Speed master and 440 source heads do not need notching on the 383.
 
Are the Stealth heads good to go out of the box, or do they usually need some porting/smoothing? From what I understand, TF heads don't usually need anything straight from the box, but what about the Stealths?
 
Righty Tighty said:
Are the Stealth heads good to go out of the box, or do they usually need some porting/smoothing? From what I understand, TF heads don't usually need anything straight from the box, but what about the Stealths?
Click to expand...
440 Source states that the Stealths are straight up bolt-on.
 
It’s pretty rare that a new head assembly, as built by the manufacturer(as opposed to being assembled with unknown parts from an on-line retailer) would have “problems” serious enough to cause a potential failure.

That’s not to say that things are always roses and unicorns though.

Here is a valve out of a Stealth head with maybe a hundred or so miles on it.
This wasn’t causing a problem...... and maybe never would have.
But that’s not the same thing as saying it’s “right”.

The shiny line is the point of contact with the seat.

7DADC849-97EB-48E6-BA5A-D5149695352D.png
 
Happy with mine. Put them on a 440 street build. I replaced springs,, keepers, locks. I don't know about out of the box, but cnc ported are nice. My spec sheet after work.
20190220_163337.jpg


Finish was nice right out of the box.
20170324_155251.jpg
 
ultimatejay said:
440 source is cheap China made crap! Stop buying and supporting China, guys
Click to expand...


All you whollier then us guys do you have a built engine in your car or are you a buff n shine car show guy. Reason I ask is what rods and crank are you running??? Who made the toothbrush you hopefully brush your teeth with? How about your oven, blender, microwave, car mats, lawnmower, rake, etc. come-on tell us.
 
You must log in or register to reply here.
-

Back
Top