I have w2 heads on my 340 Duster & just found out one has 2 cracks in it.. I found a set on e-bay but the casting #'s are different than mine. my # is 3870810 his are 3577634 I called the mopar tec line they never seen this #. and suggested this site anybody know if these are the same as my heads? the pics. look like mine....
Thanks
Mike

sounds like an early set get a hold of RyanJ he can help you http://www.shadydellspeedshop.com/

I'd hold off on anything that didn't match up. 3870810 casting
spanned several years and are pretty east to find. There were
a few different versions of the same casting. Pictures would
help a lot.

Welcome to Moparts.

here are the pics.. http://cgi.ebay.com/ebaymotors/Mopar-340...sQ5fAccessories

Thanks for the welcome
Mike

Thanks I called there just b4 the mopar tec. line I didnt get a call bk. yet

Thanks

Mike

Quote:

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here are the pics..

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I meant, pictures of your heads.

Those look like the 810 heads, they are the early heads as noted (usually casting dates will be between 1976-1978, the majority were 1977) they are identifiable by the freeze plugs in the ends, they had allot of casting variability and it was common that they cracked, usually because of port work in an area where there was unpredicted core shift (AMHIK).

The later heads that have "W2" cast into the sides under where the spark plug holes, and no freeze plugs in the ends, they are/were cast better. Same basic heads, (respective to Race or Econo) just a better/later casting.

As noted the heads in the auction look EXTENSIVELY ported, those are probably some of the earliest heads made if Petty had them, and likey better than average concerning core shift issues,I'd still be leary about cracks, thins spots, or epoxy filled holes with that set.

here r some pics. I have of my heads.....

http://s136.photobucket.com/albums/q183/plumber425/W2%20340/

That's what I would call a "1st Generation" W-2. 77-early 80's.
Freeze plugs are dead give-away. They're around. Keep looking.
I have ONE for R&D.

Post an ad in "SB Parts Wanted"

Yes mildy ported. cant tell in these pics.. How can u tell e-bay intake valves are bigger?

R&D?

Research and Development.......you know. Grind holes in, etc.

Here's a post where we discussed those E-bay W-2s briefly. Not the same as your's.

https://board.moparts.org/ubbthreads/show...rue#Post5663318

I dont know if they would work on my motor. my heads have the long valves and I think they should have the short ones I had smith bros. make push rods to fit these valves & if these e-bay heads have short valves they wont work Im going to sell this car so I dont want to get in to deep....

If your heads have offset rocker shafts and stands, they should have 5.280"-5.300" valves.

Post some pictures of your car and tell us about it.

Street? Strip? What's it run?

Street/Srtip when I got the car it was runnin 12.20s with some dialn 12 teens. Freshend the motor & got it to go 11.821 @ 115 MPH WITH the cracked head

Here is a video of a small burnout. I was playin with the pro tree for the first time...Im kinda new at this.. This was a 12.20 pass with the old motor...
http://www.youtube.com/watch?v=TIn8R3G1s4M