I pulled a spare tire mount off the side of a 54 chevy pickup,I notice the triangle bolt pattern is offset, the top two are 4 5/8" center to center but from a top one to the bottom bolt is 6" C to C.there was another (i believe 54)next to it with the same mount but the 3 bolts were all the same CtoC..The truck I pulled it off had 6 hole wheels..What do I have?