I always figure that what ever you think you will spend just double it and that will put you in the ballpark. Or at least it seems to always end up that way for me. I know I just bought a basic stroker kit that was $2k and then the full TTI exh was $600 without mufflers as I went with Dyno-Max Ultra-Flows as I knew I would not uncap my car and wanted a good flowing muffler. But the exh was close to $1000 and thats not including headers but you will be using manifolds. When I added in my heads and flat tappet cam which I got for a very good fair price from Dwayne Porter its easy to spend up near or over 6K before all the little things are bought. I bought aluminum heads but if you have iron heads worked for what you want to run you will spend a chunk to have a good set of iron heads. Even if you build your own eng its easy to spend 6k or over just in parts for a mild stroker using a basic kit. Good luck with it and hope you can keep the cost within your budget so you can enjoy it. Ron