91 front end conversion question

[qu1cks1lver56]

Hi all, im new to the forum and would like to say there are some REALLY nice trucks on here.

i've got an '86 gmc sierra classic ive been restoring. well i recently saw a truck on here with the 91 conversion setup on the front end and i fell in love with it. and now i want to do it to my truck. i saw a couple threads on here about it, and they all say something about a core support, is there a way to do it without changing the core support? like cutting or drilling my current one to make the lights and grill fit? whats so different about the 91 core support?

thanks in advance for any help.

youre going to see a few threads from me asking about various things. so get used to the million questions :p