what mounts are these ?

i know these are smallblock , are they 318/340/360 & is there any interchangability ? i sold them to a member , he gave me approximate dimensions , not exact outside flange to outside flange , inside to inside etc , so i got a rough dimension on inside of brackets & wasnt quite sure so i sent him these pics & he said they look like what he needs , so he sent me payment & acouple days go by & he says they are not what he needs & wants his money back $55 shipped , i told him id give him $40 back & i havent sent him any funds back just cause this has not set well with me , opinions please , thanx