Been browsing for a while now but this is my fist post, so first of all I want to warn you . . . I am an IT engineer and I don't know much about cars.

I finally got my 1970 Beetle, so at fist all I wanted to do was smash in Subaru EJ20 Turbo. After some browsing I came to the conclusion that this might not be the best idea with all my car knowledge.
So I wanted to find out what would you recommend to get a bit more power but without to much modifications?
I don't mind a little bit of cutting, welding or hammering

Secondly if someone could direct me to a place selling Disc brake conversion kits it would be great, I heard about the bolt on kits but I'm unable to find any info in Limpopo.
Would a Golf disc break kit work?
Thanks in advance