[Black93GT]

Yes the nuts are to mount the fenders. Just use shorter bolts so they don't extend past the nuts. I may be lucky to have 1/8" between the bolts and radiator end caps. I had to center my radiator and triple check the spacing before welding my brackets to the end caps.... But it just fits.

As far as motor placement... Mine is set as low and as far forward as possible. My oil pan has about 1/2" clearance from the crossmember. I used the lower version of Sarge's cab mounts and had to adjust the rear position/height of the transmission to get it under the tunnel without modification.