340 block casting #

[1970 duster]

bought a 340 block and crank 12/10/68 ,clocks indicates D, hand punch 9B331245, also located at front eng, L5 and R8. What I do no Dec/10/1968. not sure about the crank V 50 it has a 1/8 groove along it, any info would be greatly appreciated thanks

 

[Mrmopartech]

The block you have is the 2780930 block for 68-73.The (D)is for the day shift.The 9b331245 is the year,assembly plant,sequence number.Its a 1969 block,built at the Hamtramck MI plant,and was the 331,245 motor built.The crank if it has a 1/8 parting line down the length of the crank,its a cast crank.This is a problem,as all the origanal cranks for the 340 are forged,so check the codes and marks to be sure.Check for paint marks and codes on the number 6 counter weight to be sure.The L5 and the R8 are these on the deck surface or on the casting of the block,Mrmopartech

 

[1970 duster]

These stampings are located at the distributor end of the block. the R8 is passenger side and the L5 driver side casted on the block. 1/8 parting line is on the last three counter weights with a second one on the second last one about 3 " away. also the last counter weight the letter R and below it /50\, second last counter weight has ll and V bellow, timing chain area cast AAQA, thank you for your reply