It has nothing to do with money, connections or age. For all i know theres a 10 year old out there that knows more about cars than any of us. Its the fact that the heads, valves, lifters and all the internal parts available for that motor wasnt made to handle 600hp. As chip said, he got 2 1/2 runs out of his car. And it had a bigger motor with less horses. If you want block that can handle 400hp, the 2.3 you have will work, but it wont last as long as a V6. Less cylinders means more pressure on each one.
1993 Thunderbird LX, Stroked 4.2L Complete Cold Air Intake, AOD w/stage 2 shift kit(soon to be 5speed)