There is a few things you need to understand Blackflag. First of all, you complained that a true HEMI wouldn't be compromised for emissions. The HEMI Magnum (the 5.7L, 6.1L, 6.4L) had trouble passing the emissions, a "true" HEMI design won't be able to pass. That is one of many things that killed it.

Secondly, you complain that the output isn't at 550hp as the 426 was. The comparison that Patrick listed was one which I often site, was performed by either MT or C&D. They put the 6.1L on the dyno and the only difference in HP output was .3hp, that is it. Remember that the 6.1L is significantly smaller. Just the new 6.4L (392 cu. in.) is supposed to produce 525hp & 510 ft-lbs of tq. That leaves 34 cu. in. left to spare to increase the hp output up to your magical number 550. The rumored 6.6L is rumored to be able to produce 600hp. This engine is no slouch. The original mass produced Chrysler HEMI couldn't touch this engine (I'm refering to the original small block HEMI from the 50s).

Thirdly, the 4.7L is not related to the HEMI. It is on a completely different block with a different head design. It is not named as a HEMI but instead the Powertech engine.

Fourth, of course the 545RFE transmission would blow at 650. If it was designed for this level of power, they would have used it on the V10 in the Ram instead of the 48RE. If they dropped in an engine that that level power they would offer a transmission that could back it up.

Fifth, the second thing that killed the HEMI was its massive premium price. Building such an engine would still cost so much money it wouldn't be worth it. The HEMI Magnum is a practical HEMI. It is mainstream enough that it is both cost effective, yet it can blow away most of its competition without trying.

Fifth, if you want a big block HEMI, then just drop one in and stop whining about the HEMI Magnum. The HEMI Magnum is one of the best engines on the road today, if it isn't good enough for you then fine, just don't try spoiling our fun. Comparing the HEMI Magnum to the Modular engine is an insult that is completely uncalled for.