440,727, 8 3/4 with 3.90's headders, mounts

If I get a bite on the motor we can all work out a deal ... I just dont want to sell stuff and then have to go out and buy them again. This is a nice motor everything done right ? Holly 850 double pumper Edelbrock manifold Msd distributor high torque starter high volume oil pump , Heavy duty valve springs, Im not sure about the cam , or pistons but I believe it was done 30 over. Motor was in my uncles Pro street that he drove for two summers to car shows and swap meets. the motor twisted a drive shaft and ripped the spring mount through the floor ,this is a healthy 440.