its a 6 that replaced the slant 6 over here in 1970 we had a rt valiant charger with triple webbers on it ran 14.4 az a factory car , i think the engine was in small trucks in the usa ,that one in the pic will run high 7 i/4 in that car when sorted 2 bolt block std caps cast crank 245 cubic inch, glide we will have it out in 4 weeks to start testing.