[nolimitpkr]

if there's no thermostat in the engine stop right there and put one in. Chevys are not meant to be run without a thermostat.

Also need to check your ignition timing, it shoulf be at around 40 at 2500 during breakin. If it's retarded it will heat up, maybe turn the headers red hot.[/QUOTE

Make sure your trans lines are not leaking onto the header and causing smoke, because that is what happened too me. The fluid was only slightly dripping on the collector and then burning off, so there was none hitting the ground, which puzzled me until I got up underneath the car and saw it puking myself. Also check your fluid level again because if there is air in your cooling system the liquid in the system will quickly turn to steam, thus dradtically increasing your temp. Just my two cents!!! GOOD LUCK..