i picked my car up yesterday from the shop after getting the mods installed which included pulleys, bap, and an lfp h/e w/ reservoir. about a mile and a half from the place while stopped at a light, i noticed steam start to come through the heat extractors in the hood. i pulled over immediately before the temp gauge even moved and noticed that there was quite a bit of antifreeze at the front of the engine bay near the drivers side. i had my friend roll-back it to the shop. the pressurized the system and found no leaks whatsoever. they stated that they think there must have been an air pocket in the radiator fluid and after it heated up, it came through the overflow radiator cap. they did remove the radiator while doing the mods, so the fluid did have to be replaced, and i think they know they messed-up, but i just wanted to be sure they're giving me a reasonable explanation for what happened. sorry for the long-winded explanation and thanks for all the help.