Will motor mount towers off a 67 Chevy pick up bolt on to 73 k 5 Blazer frame?
No, motor mount towers from a '67 Chevy pickup will almost certainly not bolt directly onto a '73 K5 Blazer frame. While both are Chevy trucks, the frame designs changed significantly between those years. The dimensions, mounting points, and even the overall shape of the frame are different enough to make them incompatible. You'd need significant modification or fabrication to make them work.