Tony,
If you are going to race a lot there is no such thing as to much horsepower, but these are light cars. My first two gears even with the posi-trac are almost worthless when coming out of a corner hard. There is nothing at all wrong with having a 427 stroker, they just don't seem to live as long as the lower cubic inches. To get to 427 you have maxed a 351 out just about. And it would give you bragging rights. I have 351 emblems on mine so it is partly correct. But my horsepower comes in at 6,000 RPM and I wish it were lower. When I was originally having the engine built and was going for over 600 horse the power would have came in at around 7,2oo RPM. I had thought I was going to race it only but changed my mind. I have had mine over 100 in 3rd and it was still pulling when the corner came up. And you aren't stupid. Get what you want and like. And if you aren't going to ever push it hard the 427 will most likely last you a long time.
Ron