THIS IS FOR A NEW 1955 1956 1957 CHEVROLET CAR ENGINE SIDE MOUNTING BRACKETS KIT FOR CARS WITH A STOCK ORIGINAL FRAME. THIS KIT IS FOR SIDE MOUNTING THE ENGINE IN THE STOCK V8 LOCATION. IT IS DESIGNED TO BE WELDED IN BUT IT CAN BE BOLTED IN. MOUNTING BOLTS ARE NOT INCLUDED. IT WILL WORK WITH A BIG OR SMALL BLOCK ENGINE BUT IF YOU ARE PUTTING IN A BIG BLOCK, I WOULD RECOMMEND GOING WITH A 3/4" FORWARD MOUNT KIT. INSTRUCTIONS ARE INCLUDED. THESE ARE DANCHUK MADE IN THE USA PART #871 AND #976