Trying to fab up my mounting plate for the yet-to-be-purchased 8274. I feel the need...... the need to dull up some drill bits. Can anyone give me the len/diam of the 4 bolts. 'oesn't seem to be on Warn's site..... they just mention a p/n 7165 and p/n's for lockwashers and nuts. I assume grade 8 ? Many thanks, John Sherwood '79 FJ40 Charlotte, NC TLCA Upstate Cruisers.