340 block casting #

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