Ok so finished up the swap today a couple things I noted on the higher mileage engine. This car is an ex police package 2011 charger. I have all the maint records it was well maintained. 1st the small hole in the intake rockers on 6 of the 8 were worn shut. the valve tip was not getting oil on those and it beat the valve tip up pretty bad. I replaced the all the valves and rocker arms. The new rockers have the oil holes chamfered vs the old ones, MOPAR figured out I guess that with miles it started having oiling issues. I used the SRT MDS cam. I had pushrods out of the BGE 6.4 that I put in my 66 only had 10 miles on them so I used them. Note the BGE and Eagle head hemis have the same length pushrods I measured them. I used the springs above with new lifters. I replaced the timing chain and tensioner/guides. Man this thing sounds good !!! It feels the same until about 4K then it pulls much harder. No tune yet but there is a noticeable difference.