Need some leaf spring advice

I need to replace my leaf springs on my 72 Demon because the have ceased springing. I have an 8 3/4 rear with SBP axles and stock 14 inch wheels. I plan on doing a BBP swap in the future and getting some larger tires. I was wondering if at this point it would be a good idea to just go ahead and do offset shackles and brackets so that i will have a little extra room later on down the road. What do you guys think?