235/60/15 with a 4.5/5 drop?

[chevymotocross]

I plan on dropping my 87 swb 4.5 in front and 5 in rear. I just scored 4 perfect bf goodrich 235/60/15 tires. Will these look too small with that drop on 15x8 wheels? Or, should I use the 235 in front and a 255/60/15 in rear? Trying to save money so I might just for now, use the 4 tires I just got.

Also, I hope I'm doing the right choice with a flip kit, Mine has the 5 leaf pack. I won't be c-notching. Most I would ever haul, is a lightweight 5x8 open utility trailer with 3 dirt bikes max, and riding gear. Not much weight, but I don't want to be bottoming. I would like to avoid the shackles/hanger kit because I don't want to remove the bed at this time, since it is rotting. If I were to remove it now, I would have to fix it now and that costs money. Flip kits, I don't think require bed removal. Plus there are no rivets to break!

What do you guys think? I may be ordering my suspension parts this week.