That's my brat in the video. This wasn't an amatuer's project. The entire center of the car was cut out and a full race chassis was built. Took me about 1000hours to from the time I pulled the car into the garage and the time it left under it's own power. Two things, I would not recommend a build like this unless the builder is a journeyman fabricator and 2. a v8 will not fit in the engine bay of a first gen brat from front to back or side to side with out body mods and a whole lot of skill and inginuity.
As for a second gen on a toyata frame with a v-8, you're looking at some really serious modifications and fabrication. Again, a person shoudn't even attempt this without serious skills.