408 or gen 3 hemi

5.7 was the smallest lowest flow Gen 3 as a comparison. The 6.1 and the 6.4 are even better
@.500" 5.7=256 6.1=289 6.4=315
Wow didn’t know 6.4 head flowed that much. So get a 6.4 bore and stroke. Stock head with a port job. Single plane intake with my Holley system. What’s the deal with the cam shafts and vvt and all that other crap. Not too up to date on that stuff. Any experience with that?