I would like to mill out the bores on a stock 350 tbi unit how big can I go and where can I get new throttle blades. I will be using a milling machine to do this so they will be nice and smooth. I will also radios the top of the bores. this tb will be going on a 350 with a set of world products sr heads and a cam. I do not know the specs on the cam yet due to the fact that I have mixed feelings on which one I plan on going with. dose any one have a suggestion on a cam this is going in a truck that I plow and tow with. Thanks in advance guys.

 

some people have used 48mm TB blades from leftover TPI TBs