cheers , i will do a little investigating about the 'bumps' on another note though i have seen a few carbs online for sale. the one that really stood out was a Bigs 950 hp stage 7 double pumper holly carb on ebay. are the 950's better than the 750's then as thats what im guessing. this bigs one is asking around $900 - a lot i know so will mean a fair bit of saving up for me if i get it. is this the best one to get????