I don't know about 1 billion but I'd say you should be right at the 350 mark

I think I'll pass on both things too, lol! I was going to buy the Patriot Performance Vortecs, but it pisses me off that they jack the price up $65 bucks on me. I think I'm gonna go back to the idea of buying the Procomp aluminum heads.

Scott I really hope all this stuff works out for you because if not I'll be in a lot of trouble. LOL!

 

So I hit buy it now........and I emailed them a question and asked if they would custom jet it for me. They told me just include the engine info with my paypal payment....(um, AFTER i paid...) well they shipped the carb first thing today which means I honestly doubt they 'custom built' it to my order. Either way, Im sure it will perform well out of the box. Think Ill need any adjustments?

 

more than likely you will

 

They rebuild it to factory Holley specs, so it should run great out of the box. You just won't get every ounce of power and throttle response you can out of it, however that's not something they can do in one try. You need to buy a trick kit and experiment.

Only reason I'm having them custom jet mine is because I'm going to have them go over it anyways, and they can get it pretty close in the ball park to what I need (my new cam is .488/.510 with 300/310 duration, plus 1.6 ratio intake rockers, so the factory Jets and squirters will be insufficient.)

Like I said though, your cam and head combination is pretty much the exact engine that carb is built for. You should be VERY happy with the out of the box performance.

 

why not the 750?? too much gas?

 

Yeah, a 750 is overkill for a 350 unless it is REALLY radically worked. Im approaching that level, but 670 is almost perfect for me. A 750 would deliver too much fuel and run rich.

 

the 750 would draw less ported vacuum, and thus would require larger jets to get the proper amount of fuel. also because of the larger size, bottom end would suffer a bit. even if he added a 100 shot of nitrous, the 670 would still be the best size to go with