Hello Filip and welcome to the forum. I guess the first thing you need to do is to determine the type of car you want to work on. First, the period in which the car was manufactured. 1920's, 1930's, or a car of later vintage. Then to choose whether you want a closed car such as a coupe or sedan or an open car such as a roadster.

Generally speaking, the formula for a fast hot rod includes using the lightest car (kilos) and the biggest motor (liters).