[Formulalt1]

I think you will be fine with 36's but 42's do add room for improvement down the road Ford's 36's are actually more like 41's with a walbro's pressure and calculating in a 80% duty cycle with 500 flywheel horsepower that would require a 39lb injector. So you are running with some room for improvement with 36's. LE2 heads are very good heads but I don't know if thats the route I would go if I was looking for 450rwhp N/A 383. As head flow is the most vital part to making the big numbers. LE does do very good work and there are tons of people running well past what you are looking for with his product so it is all a matter of which route you like better though.