the 1JZ is a better choice for most applications, 2JZ is a peak hp motor not overly effective on the track. The 1JZ is the original built to compete with the RB 26 in group N… it may not have the ‘peak hp’ that a 2JZ has , but it has a massive torque curve that matches the power curve right across the RPM band. 1JZ is always the better choice for everything BUT dyno queens and drag cars.
Stock bottom end is not good for 900hp, possibly 600hp in a pinch. (1/10th the life span )
MOT approved? that only effects California as far as I’ve seen.