[A Snake]

Jerry,

I'm in agreement with Duane, and add this thought. Admittedly it is a lot easier to bolt on a NOS kit than it is to remove tweak and replace an engine, but if you really have 430 hp, that's a lot of ponies in a light car.

Please don't get me wrong here, but with what you have described, I suspect that you might be a bit high on your current hp estimate. Not knowing what cam you have or carb size, it is a little tough, but a self described "mild" tells me your real hp is probably more like 375. Still peppy, but not up to long burn outs.

Get that engine to flow some air with head work, cam and carburetion and you'll likely see 430 to 450 hp and still be able to drive it comfortably on the street.

Speaking from experience with my 427 S/O @ 480+ @6,100rpm through the side pipes (dyno tested) that much hp should scare the heck out of you without NOS, compared to what you have.

A 428 won't rev like a 427, but it will make a ton of torque and torque is what moves the car.

With the oiling of a 428, combined with normal 428 internals, redline should not generally exceed 5,500. You can make a lot of hp @ 5,000rpm with the things suggested and still have an engine that will live. I absolutely gurarantee putting NOS on it will kill it in short order.

Just my humble opinion and 30 years of playing with high hp engines.

Al