Mr.Hoover said they would sometimes create a vortec at drag racing revs )(his words , not mine ) even on 340`s...if they were on the bottom of the pan, I have never run one on the bottom on any engine I built , 400 sbc , hemi , or this 505'' wedge I have now in my 68 fastback.......
I have/had friends with dam fast 340`s , they dont run them on the bottom of the pan , and an 18 time national record holder that I grew up with , that doesn`t , of course you must have enough oil to keep it covered at all times...
food for thot ...