Lipo's for B44

[frogger]

I am looking at ordering some lipo batteries for my B44 (only race at club level so BRCA 'legality' not an issue for me ).

Maxamps do 2 different sets: http://www.maxamps.com/products.php?cat=54

I have 2 questions:
1. I will be running a Novak GTB and 6.5 brushless motor in it so if I order the 4400mah sets will 66amp Maximum Continuous Discharge be good enough?
2. If I go for the bigger 5500mah packs - where do I get the 'longer battery posts required' as specified by them?