21st century street machine frame rails

[freebird]

i am in the process of returning a prostreet camaro into a pro - touring car. I was wondering if any one has any experience with there frame rails for a first gen? My plan is to get dse mini tubs and move the rails inword. Will i have to cut the trunk pan to get them in. If any one has pics i would appriciate seeing them.

thanks in advance