347 is a good motor. The main bearings are smaller than the typical 3 inch mains of a Pontiac 389. The 3 inch mains are preferred by many engine builders. I believe a 1957 347 would be a step backwards for your 1962 with a 283.
Your 283 bellhousing will bolt to any SBC or BBC motor. I dislike the chevy V8s for being so common, but in your case, A chevy v8 will be the easiest and cheapest to swap.
As stated the pontiac swap is doable, but it will require fabrication.
Last edited by bigbadswingdaddy; 01/14/2011 12:47 AM.
