Mark could take the heads, cam and intake and put it on a LS5 454 and that would be a very good back to back test of a 1969 vs 1970 test. Not sure if that head came on the LS5 in 1970 but mu buddies '71 Chevelle has them on his car.Very good results mr.pro. I wonder just how much power was last with that intake. If that motor or a similar done 454 would you be able to get 530 horsepower. I wonder if you have it almost 1 point of compression and a little head and intake work and get the power up to 530. Or even switch to the factory aluminum dual plane on the bigger cube motor where it could end up. Just thinking out loud.