[Alan Roehrich]

Unless they've changed, Dart was using the same foundry and the same material as GM. GM has gone to a very high quality CNC process. They (BowTie blocks) were never junk, but Dart surpassed them in quality at least for a while.

Make sure you compare apples to apples when you compare blocks, don't compare the cheapest two bolt main cast cap BowTie block to a Dart Little M, that's not a reasonable comparison. At one time, GM had a few BowTie blocks that were specifically intended to be cheap and small upgrades from production blocks. They were really meant to pass tech as a factory block in low budget classes so that racers who had to run a GM block could have an alternative to used up worn out salvage yard rejects. They were not meant to be a real "aftermarket" block for high end racing.