89 D250 to a 92 D250 Swap

[FAHLGUY]

I have a 89 D250 LE that is hit in the right front...and the cab is rotted out, but the motor, tranny and rear are good.

I was just given a real clean 92 D250 with a gasser. I am going to pull the motor and tranny out and sell it.

My questions are:

Will I have to swap all my wiring harnesss' out from the 89 into the 92 cab and engine bay?

Also are the diesel and gas front suspensions different (King pins and such)? I would like to swap the motor over into the 92 frame, but not sure if it is heavy enough?

Also any other input or tips on the swap would be greatly appreciated.

Thanks,

Bill