Single groove L34 water pump pulley

[My68SS]

My apologies Boston14, what you said previously is perfectly clear. I've been staring at this screen too long and are loosing the plot!!
Read Martys post upside down - early is smooth and later is ribbed.

Does anyone have a engine bay pic of a 69 bb with ps, a/c and smog?
Is that the smog pump under the alternator in Paceme's 69 pic above?

If that's so, then the single groove for bb would have found usage on 67's [different emissions standard] and 69's [different component arrangement], but as best as I can tell, not 68's, not even exports with AIR delete [if mine is anything to go by]

[mark x22]

smog pump is under the alternator .

[My68SS]

Cheers Mark 
I see it's a L34 with ps and a/c and it appears that it's still a single groove water pump pulley? The a/c and ps belts are direct to crank?

[mark x22]

Yes