Just put a 318 from a 67 barracuda, in my 74 duster, took block had it bored .030, and steel crank polished, block had a date of 8/26/66,,, so i know they had them in 67 ,that motor replaced a 70 model duster motor i had in the car, it was built 4 years ago, it had a forged crank in it.
