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The parts your looking at will get you where you want to be. Nothing wrong with a MAF(s) as long as the system is set up correctly for the MAF(s).
How safe a set up is has to do with how well it is put together, how well it is tuned, and how close to the edge to run it.
With a factory ECU, you either need to leave a reasonable safety buffer, or add a modern knock control system.
If you run a set up at the edge of knock without a modern knock control system, your going to end up killing a engine, the quality of the fuel will not always be the same, and weather conditions also change the knock threshold. Here is some data that will show you the parts your choosing work. On stock turbos, with full 2.5" turbo back exhaust, larger intercoolers, single pop, we use to get about 330 Rear wheel HP at 14 to 15 PSI on 91 octane pump fuel.....
Now with stock turbos, 3 inch exhaust, 2.5" intercooler pipes, 2.5" massive intercoolers, dual pops and MSP manifolds at the same 14 to 15 PSI boost, we get about 415 Rear wheel HP on 91 octane pump fuel.
I have included a dyno chart of 4 cars, all 4 cars have completely stock engines and stock turbos, all 4 cars have over 100K miles on the engines, all 4 cars are running 91 octane, all 4 cars are running similar mid 11 air fuel ratios. All cars have boost controllers and all are running in the 14 PSI to 15 PSI range.
2 of the cars have 2.5" full exhaust, larger intercoolers, single pop.
2 of the cars have 3" full exhaust, 2.5" intercooler pipes with Ash massive's, Selin dual pops, MSP manifolds.
On the breather cars, notice how fast the boost comes up and how well it holds boost compared to the 2 more restricted cars. 
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