DSE subframe

[1969Crossram]

I have been planning on ordering the DSE subframe for my 69 camaro. I was told when talking to DSE that I would not have to modify my inner fenderwells nor my fender around the wheel opening. I am planning on running a 18x10 with a 275 or 285. The reason I am concerned is that I have Rallysport NOS inner fenderwells and Rallysport NOS fenders. I really do not want to modify either at the price I paid for them being GM NOS. Does anyone have this frame installed yet? If so, do you foresee any issues in these areas? I would like to use the 285 tire, but if it is an issue, I will go to the 275. The main reason I chose DSE's frame is because they seam to concentrate heavily on 1st gen camaros and their own car is using this frame running a 10 wide wheel. How about the Art Morrison for that matter. Does anyone have that in their hands yet. What is the over all thought on their frame verses the DSE frame. Art Morrisan has a long and great reputation. Thanks