sounds like a good start. i personally like the old 291's and the 462's for a nice retro look. i would use flat top pistons, the enegizer 216/216 or 218/218 @.050 lift, depending on what size valves your heads have. if i'm not mistaking, the 218/218 has a 106 degree lsa, which may give you a ruff idle. dont forget a set of headers, 2.5" exhaust, low restriction mufflers, and definatly use hyperutectic pistons. i'm not sure if northern offers hypers in there 350 kits. they are usually cast. top it off with a 600 vacuum secondary holley or my choice would be a 650 holley dp.