Really depends what you want to do with the car. If it's your daily, I would suggest keeping stock cams or going with something like an hks 256.
I had the 264 step2 on my sr with a t28 and it was a weird combination. Turbo has great spoolup and midrange, but cams were mostly top end so it made for a weird powerband.
Maybe keep stock cams until you decide to get a bigger turbo.