David,
I'm not one of the "engine guys" here, but the question you'll always be answering is, "Why did you put your money into a 283?" The mouse motor was the rage in the late 50's, but that's been more than 50 years!! People quit making parts specific to the 283 long, long ago. You'll spend a ton more money to get less horsepower and torque than you will if you scrap the 283 and start over with a good 350 block. Even better would be to jump to the LS series engine, which gives even more power to weight/size and is becoming the "standard" small block since it's been around more than ten years and is readily available. IMO you're heading down a rugged path that's going to be disappointing in the end, but then I'm not an "engine guru".