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The 1965 Chevrolet Corvette came standard with a big block engine. The motor was 396 cubic inches and was able to produce over 425 horsepower. The big block helped pave the way for future American muscle cars.
The distributor can be turned both ways. The rotor however, which I suspect you are asking about, turns clockwise on a small block V8.
One way to tell if it is a big-block car is if the car has a 'Power Blister' hood, which is a funnel shaped hood bulge on the hood .
The spring on it goes down into the intake.
There is no such thing as a small block or big block Pontiac. Outside dimensions are all the same from the 326 all the way up to the 455. The only real difference in the blocks is the size of the mains. The 326-400 run a 3" main...while the 421-455 run a 3.25" main. If you are "comparing" it to say a small and big block Chevy.....dimensionally it falls in the middle.
Tornadoes in the northern hemisphere rotate counterclockwise while those in the southern hemisphere rotate clockwise.
The Dodge Viper is unique, and unsuccessful some would say, because it has a motor unique, to itself. The V10. It makes the car nose heavy. Anyway, I do not know if Dodge calls it a big, or, small block. I do not think they classify it that way.
It's screws on clockwise.
It depends which way you're looking at it.