I hate to burst your bubble but a $5000 budget will not build the motor you want, let alone give you enough money to upgrade the tranny and the rest of the supporting parts you'll need.
I would want to see a AFR205 or 225 on that motor, with a Super Vic Spyder, 50# inj, PMS or other tuner, 75-90mm TB, and a 80mm MAF your looking at 500RWHP+ even with a mild hyd roller cam.
I wouldn't build a late model block, they DO NOT hold the power and will break with that kind of HP the motor will be capable of, seen it first hand.
I do this for a living
www.rnhperformance.net and have seen a lot of this stuff.. Everybody wants a 400+ci motor that make 600HP but has no idea what it takes to maintain that type of motor or the rest of the chassis and drivetrain.
You would be very dissapointed with a 427 stroker, stock heads (no matter how ported, your wasting money), stock intake. Since this is a street car why no go 347ci, a box stock set of Vic Jrs, and all of the supporting parts, you would be able to come in closer to your budget, still over but closer... You could even go with a 347 with the TFS Track Heat kit, I've built a few of them and the results are great, still enough power to break the block in half....
As far as internals go what do you want to know, I can give you the run down on all the brands
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