No, you're right on the raised cam location.
I believe all the "truck" motors were 4-bolt main.
Like you said...memory is kinda fuzzy -- Intakes are different, distributor is different, I believe the water pump is different too.
It's funny though, most of the aftermarket guys are using 10.200 blocks.
Bruce - I think you should build yourself a factory appearing motor.
Alum headed 435hp/427 appearing with 3 2's on it...yet the bottom end, she's 540 cubic inches, with air flow research 357CC magnum heads, and a full rollerized valvetrain.
Or a ZL1 motor....aluminum everything