i know for a fact it needs rebuilt. started to tear it down and its got a bit of gunk built up inside of it. now techinspector1 i dont plan on doing anything that crazy that you speak of. im just looking to get 300-400 hp outta the motor, 300 being more realistic but 400 would be nice. the motor is going in a 87 mazda rx7 and most likely will have a T-56 transmission behind it. it'll most likely just be a daily driver that will see the 1/4 once of so a month.

now as far has those three engines you showed be above it couldnt be any of those since its a 68-69 327. thats where i get confused, all the site i looked at online all said different things