[Dwight]

Most of your hp will come from aluminum heads and cam. I like the Brodix heads from Keith Craft and one of his custom Comp cams. Cost about $2000.
You will need 70-80mm mass air meter, 70-80mm throttle body, 70mm upper & lower intake, larger air filter and 24 injectors.

If you change to carb you will need a fuel pump, carb, regulator, heads, cam, air filter.

Years ago Holley and Edelbrock sold kits, head, cam, etc. just about everything you needed to make 350 hp.
I bought the Holley SysteMax II for fuel injection and it made 288 at the wheels, which would be 350 plus flywheel hp.

You need to plan you motor to maximize the hp per dollar. I know!

I have some part left over from past motor upgrades. Three different heads, three TB, three MA, three cams, rocker arms and lifters.
Now I'm running a 354 stroker with 90 mm mass air and TB. Edelbrock 80 mm upper & lower intake. A custom chip and lots of dyno time. I'm making 400 rear wheel hp.

Do a lot of research and make sure you have someone (dyno shop) that can tune you motor with all the new parts.
If you change to carb it may be easier. Don't forget you can change rear end gears to may it faster off the red light.

some of these guys and tell you more about tubos and superchargers.
Dwight