this is kind of continuation from my other post found here https://board.moparts.org/ubbthreads/show...e=0#Post6781571

Basically I am trying to run 11.0-11.2 with just changing the top end out from what i currently

I am running a 71 demon with a 446, has blue printed and balanced bottom end with forged rods, crank, and forged speed pro flat top pistons, it is topped off with 906 heads 906 Heads with harden seats
,3-angle valve job with bronze guides, Perfect circle seals,
Comp cams double spring retainers and keepers (valve locks)....It is backed by a 727 manual reverse valve body trans with 9" 3500 stall, and 8 3/4 with 4.10 gears, superstock springs, running 28x10 tires

What do you have for a cam and intake/carb... what
rockers are you running.... are your heads ported

its 292/509 cam right now, weiand team g single plane with race demon 825cfm carb, just 1.5 stock replacements, and heads are ported and polished I just dont have any flow numbers

thanks mr. p body btw think i have seen your car at 131 before....but what do you think i should change to cylinder head wise and cam wise and do you feel 11.0's are possible with the car with the right head and cam...

btw picking up a turbo 93 duster here hopefully in a couple weeks can see how fast i can make that p body

Speed Pro/ TRW made several different versions of the forged flat top pistons with no valve reliefs, some are for the 1968 to 1970 HP motors and some are the later 1971 and on lower compression motors. Do you know how low the deck hieght is in your motor or he actual compression ratio? If not I would recommend buying a set of the 440 Source Stealth aluminum heads, they are close to 80.CC instaed of the 90.0+ CC of the stock uncut heads, that change should help a bunch if your pistons are down in the hole .050 or more I have dyno tested a bunch of 440 motors similar to yours with 906, 346 and 452 heads, it is not hard to make those combination make 475 HP + on pump gas As far as what parts I would use to help you reach your goal is the Stealth heads with a decent set of adjustable rocker arms and pushrods to match, degree the cam to advance it 3 to 6 degrees, if you haven't already and then look at tuning that combination to its max. BTW, I really don't like any of the Mopar brand cams, I like and use Comp Cams If your interested in changing the cam also PM me for more input