340 Cam Kits which ones work with a stock block

rumblefish360 said

Well, changing a converter isn't a track thing only. A higher stall just allows the engine to get into it's power making band a lot quicker and easier. I have a 2400 in my wifes car right now. It runs and drives like a normal car with the upgraded parts smoothly. With the 3.91's, you have a higher ceiling on what can be done. but a converter change would be needed for the bigger camshafts. Without a converter change, your limited. I would suggest no larger than a 218 @ .050 duration cam.
(Generally speaking, that is in the area of 1500/1800 - 5000/5500 rpm. Depending on how made the camshaft.)

That, "Nice sounding cam" sound often considered "That Muscle car sound" which is a cam ground on a 110 LCA. Most cams are done this way. A more muscle sounding, or more radical idle will have the LCA @ a 108.

next question......

Would taking the heads off to modify them for valve springs be OK?
This maybe a needed evil and a lot depends on the spring used.

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If I knew what was in the car as far as a converter it would be different as far as what I would put in it. I would hate to drop it then only find out what I bought new is what's in there. This is my first automatic. My other mopars were 4 speeds, What mods are you talking about to the heads for springs ? If you are talking changing the springs I don't need to pull the heads to do that. The cam kit I had in my 440 RT I had to change the springs and I have the tools to change them on the car that's not a issue and I would rather change them as this motor in my Dart has never been apart it's all original as is the interior and all the sheet metal. The cam I had in my RT was from Straight Line Performance which is now Competition Components, the cam had Lobe lift .335 intake and .335 Exhaust, Valve lift was .503, Adv.Dur 270 In 284 EX, [email protected] 226 In. 238 Ex. LBC 108 IN. 116 Ex. It was a adjustable hydraulic lifter set up with new springs and rockers. It really ran good but you could not tell there was a cam in it unless you got close with the hood up and you could here a little clatter from the lifters.