Here is the engine info from the builder i got the whole setup for $4,500. I have pics and receipts that validated before i bought.
1973 340 block 10.5:1 compression ratio,bored 30 over forged pistons, forged rotating assembly from a 69 block 10/10 crank ,X heads fresh valve job with 530 lift springs. Lunati Voodoo cam part#10200703 494/513 268 /276 duration. Crower cam saver lifters part#66031X3-16, adjustable 273 rockers . Mopar distributor with new plugs and wires.