71 Swinger that lost it's TA block somehow-$2500

I have a Triple black 1970 Swinger, 4 speed (26500 miles) with a 1970 AAR TA340 with only 6500 miles on the motor from a 1970 AAR Cuda 340 that was wrecked in 1970. My 340 motor casting number is 3577190TA340. You should see a number like mine embossed on the drivers side of the motor