396/402 engine still in car. running engine for sale currently in a Chevelle
Block number 3969854 T0406 CTW This is a 2 bolt Main 350 HP Block from a 1970 Chevelle was also used in some Trucks
Paired with 336781 oval open chamber heads according to AI you can get 330 HP up to 420+ HP when pair with manifold and carburetor and cam.
It has an aluminum manifold with a 750 Holley carburetor