340 camshaft

The original Lunati VooDoo cams were designed by Harold Brookshire of blessed memory. None better when it came to cam design. Harold was the owner of UltraDyne some years back. Miss him.

This cam will fit your needs......

Voodoo Hydraulic Flat Tappet Cam & Lifter Kit - Chrysler 273-360 262/268

This cam (see link below) is the next step up, but your engine will be on the ragged edge of being overcammed and I can guarantee you that running low gears and a high stall converter on the street with no overdrive and no lockup converter for highway use gets old real quick. Not to mention loss of drivability and sucking copious amounts of gas but not going any faster. Been there, done that.

And don't get hung up on a rough idle. All that means is that your engine is running 'off cam'...... Inefficiently...... Not within its powerband and subject to reversion and all manner of drivability hassles until you bring (and keep) RPMs up enough to get into the powerband (around 2,400 RPMs with this cam) and at that point, your engine should smooth out. Just cam the engine to run well for your intended purpose and parts combo and let the idle be whatever it turns out to be. All else being equal...... A good running bone stock 318 2bbl engine will outrun an overcammed 340 4bbl engine until you've gotten revs up past 3,500 - 3,800 RPMs or so and the 340 is pulling hard. Don't let this happen to you......

Voodoo Hydraulic Flat Tappet Cam & Lifter Kit - Chrysler 273-360 268/276

Your combo sounds strong overall. If you have room underhood, lose the Torker and go to a good highrise dual plane intake such as the Edelbrock Performer RPM (make sure you get the one with center divider that goes all the way up and keep the left and right side of plenum separated...... No open spacers).

Your 750 Holley with vacuum secondaries should be fine once you sort it out for your new parts combo. If you replace it at some point, consider a 650 double pumper. You'll love the difference in performance.

Hope this helps,

Harry