need help Id'n a block

[604 Racing]

i recently bought a built shortblock, and was told it is "built" 74 challenger LA block

the block number read 4006830-360-3
rods read 44109 or 3418645
pistons B-290

any help is appreciated, THANKS!

 

[EL5DEMON340]

its a SB 360, no 340's in 74 on the challenger just 318/360

 

[swinger 367]

B-290 pistons are Badger pistons, cast aluminum cheapo replacements. I have a set, no idea what compression ratio is, but they sit down in the hole kinda far. HTH.

 

[604 Racing]

i noticed the main caps are quite larger then the 318 main caps.

the block is 360-2 NOT 360-3, sorry