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440 source heads

Tom J

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Oct 30, 2022
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Location
Ft Worth, TX
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!

Screenshot 2025-10-02 204417.png
 
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.
 
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.
 
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.
 
What did you end up doing? Anyone know if I would be around the same money reworking a set of 915 heads?
 
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
 
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