not sure whats done to the motor. it was pulled from a circle track stock car. had a 2 barrel holly 600 on it and it was not being fed enough, so i put the edelbrock 4 barrel 750 on it and she runs fine. ya 230 psi across the board it will diesel on 87 octane. ya easy swap. the guy who pulled the 13 b rotory cut the entire wiring harness so no turn signals. but has headlights running and brake lights. right now i am having trouble cooling that engine it just doesnt want to stay cool. thas about it ask anything else if needed.