274/474 for stock 340

Isky 280mega oval track cam. 232 at 050 and a 106lsa which will make it a bit choppier. The 701 is really small from a duration standpoint, barely above a factory 340 cam. Something cut on a narrower LSA will make the same cam idle a bit choppier due to overlap.

The 284 is a bit heavy for something were a crackling idle is the only real desired result.

Going to likely require bumping up initial timing with the cam change, so don't forget to alter the distributor/advance.