You can drill a 1/4" npt fitting on the top and get the correct manifold vacuum. I had to do this on my cross ram intake, this is for my breaks,trans and heater. Works fine. If you look at any intake theres a place for vacumm port it's there on the top.You mite want to put some 50cc acceleator pumps on those 450s, because the secondaries dont have squrters to help with any lean spots. It depends on the cam that you run.
You can have lift but go with about a Compcam 280 I just put a cross ram on my 406 and WOW does it lite up the tires to easy.You also need a vacuum line to carb to carb to equalize the vacuum between the two. You want to use a lower duration cam on a street driver, or else with a bigger cam , you have to use a 3,200 stall converter at least, the intake make's power in the 3,500 to 7,500 RPM range . You also need a good set of heads like Dart Pro 1s with 230 on the intake side.If you want a hot setup use 600 carbs,The 280 cam will make it more driveable. If I'm wrong , PLEASE anyone let me know . I do NOT want to give the wrong info to anyone. Please plan your motor out on the parts before you buy them,you want everything to match if you want it to run,and if you cant afford it wait until you can, because you wont be happy and end up buying what you wanted in the first place. Talk about cost.
Thanks George
[ March 25, 2002: Message edited by: 1BAD80 ]
[ March 25, 2002: Message edited by: 1BAD80 ]
[ March 25, 2002: Message edited by: 1BAD80 ]</p>