Hi i want to ask a few questions I have A 1998 Mustang G.T 4.6 automatic 1st when i stop at a red light and then it turns green my car troughs a cloud of white smoke out of the exhaust Ive taken to get checked and they tell me its coolent getting into the engine, it burns and thats when white smoke comes out the exhaust, those that sound about right? they tell me its the head gaskets that i have to replace but its kind of pricey and since my engine has about 137k miles they tell me its better to replace the hole engine with a new one then to fix the problem what do u think? 2nd if i need to get a new engine what engine should i get that fits directly to the car without doing any modifications to the car? If i need to get a new engine i would like to get an engine that has more horsepower than stock can u guys help me out on that? One last thing i have a few boltons in the engine i have right now that i would like to use in the new engine I have BBK cold air intake, BBK shorty headers, Performance pulleys, Bassani X pipe with no cats, 2 inch piping from headers all the way to tips, spin tech mufflers, and 373 gears. Can u guys help me out on what engine i should get and if there is an engine that has more horsepower than stock and if u guys might now the price of it give or take. If u guys could answer these few questions i would really appreciated. Thank You.