Did you run the 13.38@98mph on the HX40? Id like to get into that range with mine eventually.
I think I would either go with a 62/71/14 or a 64/71/14. Either would be fine.
Eric
a 62mm will fit the bill better than a 64. With your current fueling going to a 64 will only increase lag and cruising egt's, also top end HP will be almost identical with your mods.....
Doug