Abarth inspired engine... Tutorials?

[Mike]

Hello everyone,

Just beginning my Fiat 126p journey, of course starting with performance, but want to keep it "classy" with upgrades instead of a full swap to a motorbike or FIRE engine.

In my google research, I see that there are several Abarth inspired engines for sale. They seem to be very similar in build, and so I was wondering if there was one source of truth anywhere? Perhaps a tutorial?

A couple of engines for reference, but I am sure you've all seen them:
https://www.teilezentrale.de/en/complete-engine-for-fiat-500-f-r-l-n-d-fiat-126-abarth-tuning-126p-650cc-stage-3-35hp-engines-fiat.html
https://www.dangelomotori.it/en/product/engine-650-cc-40-horse-power-for-fiat-500-f-l-r-and-126-classic-sport-model-by-dangelo-motori-copia/


Thank you in advance!