340 Modifications

MOPARJ said

So would an XE268 give it that choppy, rumpity cam or would another grind, based on the fact that it is a stock internal block?

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I am running an XE268H in a 360 and it is basically a smooth idling cam in a 10.6:1 360. It runs like stink though from 1500-6500 rpm.

Remember "that choppy, rumpity" idle is caused by overlap and inefficient burning of the mixture in the lower rpms which means you are giving up bottom end.