Reliable CVH's are hard to come by these days, even newly built... but if you do want to build one then for your target power you need a standard engine, a chip a clutch and a stage 2 T3 (.36/50), then just hope your MFI can fuel reliably.
Cam, head work, rods and pistons are not needed, if you think you'll want more power later on then of course that's different, on top of them you'd need EFI management and injectors to have any hope of it staying in tune too.