#2951250 Heads

[440+6]

I have a set of #2951250 heads. I know they're from a '68 440 and have 2.08 and 1.74 valves but what is the difference between them and 906's? I would imagine it would have to be the port configuration. Has anybody ever ported these heads to give me an idea of what they're capable of?

[rampage_82]

I also have a pair of these, and they seem to have the exact same ports as the 906's, i haven't found one difference between the two castings...

[dave5711]

Some great info in the cylinder heads part 1 2 and 3 articles at mopar muscle magazine

Here's a link to one of them
http://www.moparmusclemagazine.com/t..._ii/index.html

[DartGT66]

If I'm not all wrong, the 250 heads originally came mainly in some '68 2 bbl 383's. And it's not the same as 906 heads port vise, rather the same as the older 516 heads, which is slightly worse design?

[rampage_82]

I don't know my 250's are open chambers and have the 2.08 1.74 valves, and the ports look identical to the 906's that are right beside it....

[DartGT66]

Yes, they are open chamber and with the bigger valve sizes. I actually thought the same, once I had 906's and 250's next to each other and thought they were similar in design, but was later corrected by others at moparts. It's been so many years, that I really wasn't sure wether it truely was, or wasn't a different design.

[cageman]

Once proted though, arent they all the same eh

[DartGT66]

No they aren't. The older heads tend to be about 5% worse flowing on the intake side and worse on exhaust. There just isn't enough material in the right places comapred to the newer heads.