Try the Nutrition forum with Santana or some of the lads over at the Barbell Medicine forums, they love this kind of stuff and I'd be curious to see what they say.
For me I really think you should just run a standard LP, once you get to Intermediate maybe you'd have to make some kind of concessions if 70g p/d is genuinely your max but I'd cross that bridge only IF it became a problem.
Plenty of people lift on less than 70g.