Just my 2 cents of course, but honestly, you plan on putting down some money to build up the bike, your Grail bike at that. It won't fit right, no matter what you do to it. Now, you will have a grail bike, that you put money into, sit and you and friends can stare at it. I like looking at beautifully made bicycles, but not for long before I want to mash some pedals. Unless this frameset is super cheap, I would move on. Again, IMHO.

Good luck in your decision.