From that I understand street use. Magnum or LA heads?
I would consider keeping the duration down to 220° to 224° intake and 230°exh. 108°LSA. For lift you would do well to shoot for 0.500" to 0.525". Valve spring upgrade is required.
Another consideration would be increasing rocker ratio by .1. Rockers are good in that other than the rocker covers, no disassembly needs be done. This generally gives a bit of a torque boost for minimal cost. Valve springs can be changed in the car. I believe you have a spring installed height of about 1.800". This would allow use of Chevy beehive springs at reasonable cost. Need retainers and keepers to match.
