I HAVE EAST MOTOR IN MY RAT WITH 190HP IS and BLOCK 292, the 312 IS FOR ANOTHER PROJECT WOULD WANT TO KNOW WHICHEVER HP BRINGS OF MAKES
I think you are asking the HP numbers for the 312? If so, do you have any casting numbers on the engine block or heads? look here http://www.ford-y-block.com/Block identification.htm OR http://www.ford-y-block.com/cylinderheadchart.htm