There are ton's of threads about heads comparisons
The cylinder heads on the BB B/RB engines are the biggest place to be able to get more power out of a BB Mopar Wedge engine... Also maybe you could use a
FASTMAN EFI instead of the MSD Atomic, you can supposedly run allot more camshaft, not limit yourself so much, to let the much bigger engine breath, much better too.... IMHFO I would say
"the out of the box heads" heads unported, between those 2 choices, I would choose the Indy head, it's much better, much more money too, the Stealth's can be made to work, nothing really wrong with them, but they need
professional porting, with a multi-angle performance valve job & upgraded the cheap retainers, locks, seals & springs, at a minimum, to get the most out of them, bang for the buck so to speak... I personally like the Edelbrock RPMs better, than the Stealth's or even the Indy's for "
Bang for the Buck" at the 500-750HP levels, personally I think they have a better overall design & will do the job easily also, but are also more money than the Stealth's are too, but are
cheaper/less expensive than the Indy's are too, they are a great center price point heads.... Edelbrock Victors or MP Stage VI Aluminum heads are also other great choices too, they both have much larger ports to begin with, w/280cc vs 210cc {staring points} Intake Port volume, but will need expensive offset rockers & other special parts, you cant use stock type valve train components, like the Stealth's or RPM's, but are still really good affordable aluminum heads, but are more money than the other 3 style aluminum heads listed, to build them correctly.... Almost any head can be made to work, even an old 906 iron head, can be made to work... To get to the 600 HP range you need
around a minimum of 300+cfm of flow in the intake ports {
2.06hp/per cfm of flow ball park}, easy to achieve with any of the ones mentioned @ a minimum, the heads will be the biggest choke point.... I don't know much about the MSD Atomic EFI, but have read about the
Fastman Efi stuff with great reviews, also great tech support, buy the Fastman Efi owner/FBBO member/author of "How to build Max Performance Hemi Engines" a machine shop owner in Calif.,
Richard Nedbal @ www.fastmanefi.com or 1-209-247-6497 , also we have a great professional head porter & Mopar Muscle Challenge professional engine builder here on FBBO Member/
IQ52, Jim LaRoy {also his son Cody}, LaRoy Engines out of Challis Idaho... Mancini Racing is also a great resource... good luck
