LOL.
Why does it matter if he was 19?
It doesn't matter. But guaranteed said vehicle owner had massive chromies, chops in the back and a flappy brimed white cap.
400hp breww, n ma m8 hez a 600hp Lansa GS brew. Got Nawz n all brew itz heepz sik ey.
The then they put it in [1] and drive up and down the main drag letting it run down in gear so it sounds like a manual, occasionally giving it a little throttle to make it sound like a lumpy cam.
Is it possible to fit an Alloytec to a VT, sure.
Can the OP do it, no. He had to ask if its possible. He can't do it.
Under the assumption it was 400hp?
Made an assumption based on no evidence anywhere ever in the world full stop?
There's a diagnosis for that: Dumb.