468,BBC Brodix race rite versus AFR.265 & Recap of 400sbc ver. 396bbc

I go over dyno testing that I did on 3 different sets of cylinder heads on my 468ci, BBC test motor.
1#Brodix Race Rite 270cc oval ports
2#Brodix Race Rite 294cc rec. port
3#AFR. Mag. 265cc oval port
468ci 10.3to1, edl RPM. intake, 2bolt main 454 block, with GM. Ls6 windage tray.
also a =
A recap and some input from some of the viewers comments on the 400 s b c versus 396b b c stock rebuild motors,with cam intake upgrade's