Power from a 914 aircooled, Questions about potential Options

[Mwood]

Hey, Im new to forums, I apologize if this is in the wrong section.

I have been looking to start a project car since relocating to the bay area forced me to abandon my previous one. i really want to work on some kind of 914 autox/road car/rod project but I am not sure of a few things and wondered if you guys could help me clear this up a bit.

I love the looks of the 914, especially ones with the sheridan fiberglass. I love the lines,
Size, style, simplicity of the cars. I am also very interested in air cooled engines because i appreciate simple, basic mechanicals and i like the simplicity of carbs and im still pretty green with engine work and complex car mechanics. And something about putting a big american v8 in a car like this irks me a little. Seems a little ham fisted.

Is it feasible to get around 250-300 torque/hp from a built aircooled 914 engine with something like dual webers and internal mods? Is that overly excessive for a 914 street/mild track car? I dont really want to spend over 2 to 3 grand modifying the engine. I have read that 1.7L 914 engines accept upgrades better but i feel like the displacement would need to be increased to get that much power. Mechanically i believe i am capable of bolting an engine together (i rebuilt my previous nissan KA engine a couple times) but details like internal engine upgrade specifications and the power gains they yield are foreign to me.

My idea is to do some kind of tuned car with 911 suspension and running gear/ built carbed aircooled, seriously lightened interior and maybe a fiberglass widebody if i get that extreme.

Please give me some feedback!
Thanks!