I've got a 383 with the Accel SuperRam setup on it getting ready to drop into my 66 C10. I had a version of this motor (smaller cam and less compression) in a differant car with the aftermarket T56 that's also going in the 66 and I loved this setup. You wouldn't need to go this far with your 283.
I'm using a Howell harness and I had PCMforless.com burn me a chip for a safe tune until I can get my new engine tuned with the Moates software.
With your 283 I'd just run the stock 305 TPI & chip unless you wanted to get into tuning it yourself. Just make sure the chip has the VATS disabled.