did I mistake?

There is nothing wrong with building a 318. A-bodies don't weigh much and a 318 will push one down the road real nice.

If it's power you want, there are a few good web articles on building a 400 hp 318 on a budget. I do have a concern that if your car was /6, do you have an 8.25 or 7.25 axle? 7.25 will self destruct behind even a stock 318. Luckilly 8.25s are cheap, plentiful, and with a little TLC will stand up to a 318 no problem.

I personally don't care for big blocks in A-bodies, only because of the extra weight. I like my cars to handle....

Building a 4 door is cool...they are the ultimate sleeper:thumblef: