340 Cam Kits which ones work with a stock block

The Wallace calculator works off the advertised numbers and speaks nothing about power, and is only used to compare low-rpm performance. Yes I know about the Mopar ramps, but they are not part of the Wallace equation.
And the OP is looking for the lope more than anything which is not affected by the slow-azz ramps.
Further, building compression cannot start until the intake valve closes so again, we CAN use the advertised numbers cuz that's all we got.
Yes it's true that not all cams use the same reference point to determine the advertised, but IMO, for this size of cam, .002 one way or another is not gonna upset the calculations very much. Most hydros are now at .006, while a select few are at .008, and every once in a while I trip over a .004.
And bottom line is; I wasn't recommending the 274, only using it as a springboard to illustrate the lack of cylinder pressure issue and the problem with choosing a lopey cam as it might affect an already poor low-rpm performance.

If I failed in that, then I apologize.