Just found a pic I did for somebody else to try and explain the bolt spacings.

You can see how close the fiat/alfa weber is to fitting on the stock rolla manifold....

 

 

Have fun! :)

ah thanks man uve been big help i will be looking through ure turbo thread again shorltley i want to make minumm 50rwkw so i think i may be going a turbo not sure yet have to see what happens

No worries buddy, at least you've got the right carb already for blow-through. :)