i argue that the 83-88 monte carlo SS could and did click off mid-15 second 1/4 mile times with a relatively stock 305. The monte carlo, as you know, weighed about 3400-3500 lbs.
This contrasted to the 57 corvette, which was probably the 283's most shinning moment, weighed considerably less and was able to acheive high 14 second times. But, this engine was equipped with the fuel injection system.
If the 305 had such as system installed, who knows?
i don't think a stock, carbed 283 can beat a stock, carbed 305.
Actually, this is getting geeky. i just like 305's.