late 70 or early 71 340 block

[bballfan1]

Looking for a 340 block or complete short block close to this vin 1B408129

thanks

[gzig5]

This is mine
GW 340 P3307 0143 which I decode as:

G = 1971 Model Year
W = Windsor mfg plant
340 ci
P = premium fuel
3307 = born on Aug 17, 1970
143rd engine built

Should make it a late 70 or early 71 model year?

The number stamped on the passenger side above the pan looks like 1B149382 but I'd like some help from someone that has looked at more of these than me. I can't get a better pic at this time. If correct, what car would this likely have been installed in?

Can't discern the first number of the casting date but maybe 5 or 8. ?? 7 70

[Katfish]

What is this, might be 69-70

[76orangewagon]

I believe you are looking for a Mounds Rd motor my 1971 Cuda's SPD (Scheduled Production Date) is April 30,1971 and my vin is 1B386601, I found a date correct replacement block that I'm using and that vin is 1B452577 and it was assembled March 26, 1971 and was cast 1-27-71 So I would think a early March assembled motor would fit that Vin perfectly...I assume your car is a May 1971 built car ? And your motor should be Corporate Blue. I looked for several months (6-8) and called lots and lots of vendors...with no luck, then someone on Moparts saw my post and reached out to me, hopefully you can have the same or better luck. 

[bballfan1]

Yes may 26 1971 scheduled build date

[challenger3406pk]

Not sure if you found a block yet, But I have a january 71 cast date 340 block. Contact me and I can check on the vin for you.