cam shaft selection

rigrunner said

got a 73 valiant with 318 was hard to start then started missing turned out i lost a cam lobe. i want to replace the cam with something that will lope but still work with my stock 2bl carb until i can get a 4bbl setup. summit has a cam with a duration of 262/272 and lift of 420/442 i think the centerline was 110. ive been told by different people this will change my idle and some say it wont. any help would be greatly appreciated hoping to order something this week. i drive a truck and have till friday to get the order in. thanks

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To directly address the cam idle question, there is some debate on idle sound and quality differences between a stock cam and this particular Summitt cam.

IMO, I think there are a lot of deaf people listening to exhaust notes, tempos and the way the system will chop chop chop in it's new state. (New cam installed) There is a difference! But it will be very small. The Sumitt cam is a very mello one and also has a wide centerline for a smooth idle. Just like your stock 2bbl. cam. Tuning the 2bbl. to it will be very easy as well a 4bbl. will be.

IF your looking for a chop to the exhaust, look for a cam that has a centerline of 110 or 108. The lower the number, the more chop it will have.

Tell me this, what is the final plan for the 318 in it's performance goal?
I can better recomend a cam with this info about where you want to end up and with what mods will be done to the car.