My 1st car was a '70 Barracuda Gran Coupe, 383 2 bbl, 727, 3.23. 12,000 mile dealer demo car. Had many issues with the stock 2 bbl. It was fairly fast but no match for most performance cars. I wanted more performance, switched to DP4B & 3310-1, & headers. Was fairly competitive as a street racer, with the low CR, 2bbl cam & 12" converter. Never lost to a 351 Mach 1, did real well against most Chevelle's. Got beat by most similar level 340 Dart's & Duster's. It ran 15.10's at the strip, street tires didn't work that well at the track. Long story, but the 2 bbl, single exhaust was not a screamer, although I don't think a 318 could car could beat it.