I have a 1980 k-20 and i want to put an 1986 front clip, but the hoods are different. 1980 has the venting in the hood. 1986 has a separate vent piece that goes right under the windscreen. so i have the cab from the 1986, should i change the Vin plates and use the 86 cab. the 1980 cab floor is rotted out and the door hinges are shot. i have heard of cutting the hinges in, but that sounds like qa major undertaking. thanks, any suggestions will be appreciated