I would say for what your looking for you may end up spending more than 5k and you really will if you buy the suspension parts to handle all this but my suggestion if you really wana do this to your car bore your block 20 over, get a good forged rotating assembly, blah blah blah you know what all you need to support you HP wants you need the fuel, and internals to hold up to it as far as motor wise you can build your motor or buy a short block from MMR if you put the money difference together on building your motor to buying a short block its not gonna be far from each other expecially if your not doing the assembly yourself on your motor.....it has been proven that 2 valve motors can make very good power its just how much money do you wana spend that is gonna depend on how much power you will get 2v or 4v thats your choice doing the research or having someone with the knowlege tell you if its worth switching to a 4v is up to you.
If 5k is your budget then look at your options on ways to go on your build add it up and see which comes out to the better build to suit you and future mods if its....build your block, buy short block, buy long block, 2v vs. 4v......just keep in mind what your going to need on fuel upgrades, k-member for turbo, tranny upgrades, clutch upgrades, suspension upgrades, tune, fluids, gaskets if you build it!!!
Add it up and you will be very surprised building a motor/car is not cheap at all lol but i wish you the best of luck in which route you take were here to help you its easy to leave little things out of a build that add up very fast and by the time you know it your so deep into it just make sure you add everything up before you start... planning is always better!!
Also dont know what your relating to as wanting a 5.0.....talking about 94, 95 5.0 or a fox???? Your block will hold more power than a stock 5.0 pushrod motor!!! As far as installing a 5.0 in your car it has been done but your talking ECU, wiring harness so on so on!!
Life is to short to live it pissed off cherish who and what you got while you can! Free speech isnít so free when it comes to protected classes and races, is it?