1969 Barracuda Fastback

If it runs well in the street I would leave it with the big block and have fun driving the car. If you EVER get tired of driving the big block you could always switch it later. Why waste money replacing the engine if you might enjoy it the way it is??? The engine will certainly turn heads. In my mind it's worth more with the big block than it would be with a stock 318!! Even the 8 3/4 didn't necessarily come stock on a 318, so why mess with throwing money at a car that's already great car.