Reverse rotation ... only the crank turns in reverse, everything else is normal. Only the firing order on the dist is reversed but the dist still rotates in the same direction ... it has to to drive the oil pump so it sucks instead of blows!

If its a reverse rotation engine then the dist. gear would be the same as any normal big block and so would the cam. The crank would be turning counterclockwise but the cam would be turning clockwise because of the gear drive.