YR, I dont have a magnum block, nor am I looking to obtain a magnum block. Basically is the first year of the 360 (71 if Im not mistaken) which I own OR obtain one of the final years of the Non magnum 360 (89-92 if Im not mistaken) from this donor.
Got it. I'd use the earlier block. They changed the core boxes on the later castings and made the water jackets a different shape. That's when the first run of Chrylser heads started breaking and the blocks would fracture from the head bolt over to the water jacket. In fact, many of those blocks had open head bolts like a cheap assed Chevy. You may not have that. But I'd run the early block.
