350-400 hp/tq at least. My budget is about 3 thousand maybe more
With a stocker type 400 you could run a dish (or flat top) hyper and about 218-228 dur and 450-480 lift on a 112 -114 and make tha powert with just about any old heads. Your desired goal for TQ is easily attainable. Are you buying a complete rotating assy? I don't assume you'll be racing this motor, just want something with big grunt. A set of cylinder heads with about 180-200cc runner would serve you well - even set of Summit ZZ5 VORTEC heads on a mild 400 ought to save you a few bucks and run like a raped ape. What type head are you planning to use? How about intake/carb? Will you be using a flat tappet cam?