I used the 403 Voodoo in my 340/416 with a similar compression as yours. However, I'm running an AirGap, headers, 750 Mighty Demon, 727/3200 with 3:91. Buddy ran the milder 402 Voodoo in his 360/408 built the same as mine with 2400 stall. I can't recall what other off-the-shelf cams I considered. Perhaps talk to some of the custom cam people for their input. You have choices.