[Dominik]

If your approach is merely to save total (curb) weight, you may find that your car comes easily under 2.200 lbs (1.000 kg). I had a, to you guys unknown make (LDS), 427 with cast iron 302. It did weigh 1.015 kg. With a single seater racing screen, T5 box and ally differential.

My RAM (from UK) with an all-ally 496 Chevy and Jag suspension & brakes was 2.015 lbs (917 kg)

If you like to reduce rotational weight, which performance-wise counts for much more than total weight, perhaps also consider lighter wheels and tires. I had Hoosiers on the RAM.

Drive a 302 with an aluminium flywheel. I haven't yet.
Get a shatter-proof bellhousing - (which does weigh extra).

I am dying to weigh my latest 427 with leightweight body but cast iron heads on a 427 FE.
Just for reference.