I'm rebuilding my 72 440 any suggestions on aluminum heads source 440 or Eldebrock heads? Going with 10.1-1 pistons. Thinking about ordering Eldebrock top end kit. Just want to hear about those Source heads??
The trick flow heads look more expensive at first, but they are one of the best "out-of-the-box" heads that I know of. Order the version with the correct valve springs, and bolt them on.
Many people getting stealth or RPM heads (Like me) don't use the valve springs/retainers that come with the heads, then they do some port clean-up and a new valve job, or they send them out to be fully ported so they flow about what the Trick flow heads do out of the box.
I think the TF heads do need a specific rocker arm assembly which is not cheap, but it is likely an upgrade that would be made with any of the other heads, unless doing a really budget build with mild cam and stock rocker arms. I did not actually check to see what rockers work with the Trick Flow heads, I just used their part number for the HS 1.6:1 ratio rocker arms. I have had my cylinder head guy check out and bench flow several heads. We have flowed the Stealth heads stock, and with clean-up mild port work, the Brodix B1-B/S heads (already had stage1 porting from Koffels), Victor MW in stock, mild ported, and the Hughes Monster CNC ported versions, and the Trick Flow 240 heads (out of the box.)
The trick flow heads actually flowed as advertised (around 330 cfm) which I think is better then the out of the box MW Victor heads were, and much better than any of the other stock port window heads, most of which needed work just to get them to their advertised flows of about 280-290 cfm?
On the other hand, the Stealth heads do look more like a stock head than any other aluminum head, and they are inexpensive, and will work with a mild cam and stock rocker arms. I am actually running a set of stealth heads on the 505" stroked 440 in the convertible because I originally wanted the stock look, but as mentioned, we did do some bowl and valve seat blending and hand porting to the heads along with a valve job to get mid 280s flow out of them. Because that engine runs a hydraulic roller cam the valve springs and retainers were also changed. I also ended up running HS rocker arms on those stealth heads, so in the end I really did not save much money using those heads, and they did cost me more in time and labor.