I’ve only run maybe 10 340’s on the dyno.
Never a “stock” one.
This was the mildest one, originally built in about 1987, then freshened up I’d say around 14 years ago, which is when it was tested.
Was originally a low cr cast crank motor that got cast replacement pistons for the earlier engine.
587 heads that had 2.02 intake valves installed, and bowls blended back in 1987(one of my earliest “porting” jobs).
For the freshen up it got a Comp 268H cam.
The std performer intake and Holley 650DP were reused, and it was tested with 1-5/8 x 3 headers.
Made 378tq/343hp.
It resided in a lil red express truck with a ta hemi converter and 3.55’s.