bbc blower pulley

Whats the biggest 14mm blower pulley that will fit a bbc with standard cam location? Considering a screw blower and I am concerned about being able to turn it fast enough. Machining the bottom of fuel pump mounting flange I can gain at least 400 thou/in.

 

With the pump extension cut, I had a 45 on there.

 

lower blower pulley

9.800 or 10.200 block? with a screw blower you may need to us 8MM pulleys and belts to get the over drive you need, It is what we have been using for years.
good luck Butch

 

If you are looking at the 8mm possibility I have a 72 on the bottom but had to mill the pump mount a bit.

For what its worth.

 

Thanks guys. As far as the block goes its a 10.2 deck, cam is same location tho as a 9.8 block.