89-91 suburban conversion

[jrcchevy]

I have a '75 chevy truck that I am going to convert to look like the 89-91 suburban front end. I have an '84 suburban right now that I am using as parts. For the time being, I am using the core support and fenders off of the suburban. Yesterday, I started out by hollowing out the factory core support frame bracket holes to fit the core support rubber bushings from the suburban. My problem is that the core support is not in the correct location doing as I have with the mounting bracket from the '75 (note: they are riveted to the chassis) and the rubber mount from the suburban. I only started assembly of the front clip so that I could adapt the hood hinges to the '75 firewall. Has anyone ever attempted this conversion before and if so, could you please help me!! Thanks much!