I have discovered what could be a problem , maybe not
The 4 studs that hold the 2 crankshaft bearing castings on each side , are smaller in diameter then the holes in the castings . This means , the casting can move around all over the place . There is no locating pin at all I can see .
The studs measure as .470". The holes in the castings are .580" , there is over .100" of space in there ?
Am I not seeing something ?