You don't seem to know where you're going with this ....
An SAFC will be completely pointless (moreso than it already is) once you get a chipped ecu with a good basemap. Also, any NA mods that will pull you into low 14's will be counter productive for when you want to turbo. To go that low without boosting, you're going to have to build your compression higher, which is rather counterproductive for a safe and effective turbo build.
If you plan on turboing, but want to build first, plan on spending a lot of money and getting no instant result. Building a good turbo setup, like flat-top forged pistons, GSR cams, a thicker head gasket, Eagle or TT rods, ARP headstuds, double valve springs, upgraded valves + retainers ..... none of these will really make your car too much faster. You'll notice it, but it won't be potent like if you were gearing towards NA.
But all those would be worthwhile investments if you plan on turboing someday.