DART 98 vs AJ Alky Heads

I have a TFX 451ci TAD motor with Dart 98 heads thinking of changing to AJ alky heads. what kind of gain would I get from the AJ heads if any? Looking to run this TFX billet hemi in a Outlaw car. would I have to change Pistons? compression is 11.3 to 1. I am using stage five roller tipped rockers on both sides aj stands on the Dart 98 heads, can they be used on the AJ heads?
I dont know much about Hemi, going from Chevy to Hemi
Thank you very much for your time and any help.
thanks
Jimmy

Motor specs:

TFX block has bryant crank 3850 stroke, je pistons 4310 bore, grp rods, osen 18qt pan, systems one oil pump 180lbs watermans red coated alcohol fuel pump at 17.4gallons rcd blower drive psi, large shaft mag drive the gear drive has the support bearing built in the gear drive like top fuel uses. indy polished single pulg valve covers, stage five roller tipped rockers both sides aj stands, vavles springs and retainers dart 98 heads with 162cc pistons set at 11.3 to 1 engine, buttons pins are unbrakable, bullet cam 1inch lifters engine ci is 451 top rpm is about 10,000 rpms

 

If you are talking about these heads http://www.alanjohnson.com/Flyers/musclehead-flyer-back3.jpg , the only thing that will fit from your current set up is the int. rockers , inside head studs and valve cover studs . If so you will need , rods & pistons , pushrods , head studs , new rocker stands , rocker stand studs , ex. rockers , rocker shafts , valve covers and tubes , int. manifold , possibly a mag drive depending on what you have now , new headers also .

You stated AJ alky heads but if you are talking about fuel heads , most of your current parts should fit .

 

AJ fuel heads

would AJ fuel heads make more power then Dart 98 heads?
thanks
Jimmy

 

Don't Think You Will See Any Difference...basically Your Aj,dart Walt Austin, Are All The Same Head...

 

I was told that you can get around 300HP more out of BAE or AJ heads. that Dart heads dont make as much Horse power as the AJ and BAE heads, why I dont know?

thanks
Jimmy