I may have wrong sills (49.5 in.long),or wrong front bed plate(new from chevy duty)or too much fun in the 60's or all of above. The 1st. sill holes does not line-up to be bolted with the front bed plate holes(9 of them on leading edge of shelf for bed boards,they are facing rear of truck).The two holes on one side of sill look like they should be in play but do not line-up with holes in front bed plate! Take one dollar for this relaxing hobby truck right now!!