I have never had any issues with my setup at all even before the built motor,or before i ever knew chris.Blower has been on the car since 08 and i have not once ever thrown a belt.So i don't completely understand what you are trying to say.I know chris didn't have any issues as well.
Easy way= Swapping a head unit to your existing bracket and adding a few washer to spacer out the blower so the belt rides properly.
Not so easy way= Dismounting everything and starting from scratch.
Chris is game, he has been telling me along time ago that this was the way to go and actually wants to do a custom setup. Maybe this time i have explained myself better.
correct me if I'm wrong- but isn't the majority of this thread about the build of your car and the adversity of getting it where it's at? and no you don't just put a f1a on your existing bracket- you would get bracket flex out the ass, even with the extra bracing you have. don't take me wrong I mean no offense what so ever. kudos to you for never stopping