Our 67 Dart has a 1970 318 that runs like a scalded dog, that someone else installed. #GM 318 R. Does anyone have any insight on the stamped numbers on the block? Was this a special engine from 1970?
the R blocks came out in 89 as a replacement for racers on the right bank it should have an R cast into it right behind the alternator just below the deck and next time you have the timing chain cover off check the water inlets if they are round its just a plain jane block but if they are half moons you really have a pricey item on your hands
