348/409 Motor

[PeteLeathersac]

Is this the truck block notch Verne?.

http://www.superchevy.com/features/p.../photo_04.html

And they're on all truck blocks whether 348 or 409's?.

What's the whole story on the two notches in earlier blocks and one notch on the later blocks thing...two is worse?.

Do 409's always have the counterbalanced crank and the 348's the round one where the flywheel bolts on?.

And are the distributors and waterpumps W-motor only or do SB or BB ones fit?.

Thanks!.

~ Pete