Just a little friendly advice, Nick. Remember, this is a free message board, and nobody is entitled to getting responses, yet you're getting a lot of great advice in your posts. You're asking a ten part question and basically expecting to get all the info you want, worded in the way you want it. You've already had probably 5 of the most knowledgeable Mopar engine builders in the country respond to your questions, and each has told you you won't get 550 hp with that small cam (regardless of stroker or 440), but best shot of getting anywhere close to that number with that cam, will be with good heads and a stroker. They have also offered up proven combinations that will for sure get you to that number and beyond, both with a 440 or a stroker, but it will require a more aggressive cam and with that, there may be compromises to what you consider being streetable. Unfortunately, thats it. There is no magic small cam out there. If 550/600 is what is most important (as noted in the title), its very easy to map out a combo that will get you there, just be open to cam choice and budget.