ITS BEEN ABOUT 10 YEARS SINCE I BUILT MY LAST ROD AND I CAN'T REMEMBER WHAT YEAR/MODEL OF MOTOR MOUNTS I USED. THE ONES I USED HAD THE METAL PART WITH 3 HOLES THAT MOUNTS TO THE SIDE OF THE BLOCK, BUT THERE WAS A RUBBER ISOLATER BONDED TO THIS, AND A STEEL PART BONDED TO THE OTHER SIDE OF THE ISOLATER THAT HAD A FLANGE WITH 2 HOLES IN IT FACING OUT AWAY FROM THE ENGINE BLOCK. I HAD A PEICE OF MECHANICAL TUBING MOUNTED AT 90 DEGREES TO A 1 1/2" SQUARE TUBE WHICH WAS WELDED TO THE FRAME RAIL, AND THE TUBE FIT BETWEEN THE FLANGES, AND A BOLT PASSED THRU BOTH FLANGES AND MY MECHANICAL TUBING TO SUPPORT THE MOTOR. DOES ANYBODY OUT THERE RECOGNIZE WHAT YEAR AND MODEL OF G.M. MOTOR MOUNT THIS WAS?