Are they A/N threaded or pipe threaded. Let me see here. Found the GMS site
http://www.granatellimotorsports.com/
Looks to me like they are A/N threaded? If so you'll need an A/N 08 coupler, an 08/06 flare union reducer, and an 06 hose end.
-08 coupler 8.99 (799-4001)
-08/06 reducer 6.99 (799-6177)
-06 Hose end 4.99 (799-1002)
So 21.00 bucks to solve the problem or there abouts. those are Russell fittings and are all straight,and are all Jeg's parts numbers. I think they use a company prefix followed by a manufacturer suffix. So if you have a parts palce close by that has Russell stuff or you have another mail order parts company you deal with then try giving the suffix part number and see what they have.