[jerryvarnell]

I got a 94 350 with a 2004 vette h pipe exhaust, weiand intake,a 650 carter and long tube headers.
It has the tbi swirly? Heads on it. I'm wondering what kind of cam would be best suited for the heads. Any pointers for which I could focus on, torque or horses?
what kind of fuel economy should I be getting?

[psbaker75]

Those heads are good for low end torque, terrible for high end horses... consider a cam that will give you a nice flat torque curve for your build and you should be happy

[jerryvarnell]

Is the 650 cfm I got on it too small? I know Carb size can greatly affect mileage and power.
When I get on it it don't sound like its running to its full potential..
With straight headers it shouldn't sound so lean with the throttle
on the floor.

[psbaker75]

650 should be more than fine depending on tune and intended usage. The engine will be limited more by those heads than the carb if big performance is your goal... those swirl port heads run out of breath around 4500-5000 rpm

[techinspector1]

Makes no sense to me to spend money trying to prop up those heads. Buy some RHS #12407 (iron guides) or 12410 (bronze guides) bare heads and fill 'em with valves, springs, locks and keepers from Competition Products, based on what the cam needs for springs. Always, always, always use the grinder's recommendations for springs to use with their cam grind. You can put a dandy set of brand new iron street heads together for under 800 bucks that will outflow L31's.

[jerryvarnell]

From what I've read about the swirlies they're cheap torque monsters.
Like I said before I'm not making a street beast just a truck that gets
good gas mileage and some power to it. I have another set of
Swirlies I could port n Polish. That would seem ideal.

With what I have on it now what kind of numbers should I be pushing?