Ok, how about some advice from someone with a Turbo D16 built (D16y8block, 9:1, D16Z6head for lower compression). So...for the cost of building the D you could have a B...even an H. This is true. I did the math before hand, and i watched my friend build his B18C for turbo(im talking FULLY built...nothing was left OEM). It was far more expensive to build than my little D...still a bad ass engine though. Now, if you buy a swap, clutch, resurfacefly wheel, get good mounts(worth doing) all the bolt ons, the little parts you'll need , and pay a shop to install it...that is a chuck of change. If you do it yourself, you could save a good amount of money and make it very worth the time.
So, now you have a D series and its already in the car and you want to go turbo!? good call. Oddly enough the D series potentially makes more torque than most of the B series family(yay for stroke!), the sleeved in a D series block are safe up to 18-20psi for race days(yes, ive tested it so dont go off on how relseving is better, i know it is
). To do this fast engine, you will need to Build your engine. Head work is not end all nessacary(still good to do though!!)...you could hit 12's without it...boosting around 11-12psi. Ive seen it done in front of me. IMO its not worth getting a "kit" for going turbo. If you mean businesss you'll go out, learn your shit, and peice it together right. You will also get more power from this method and probably spend the same is not less...i spent less. If you build your D you will probably spend a swaps cost, maybe even before you buy the turbo...maybe not. Remember there is around 1500-2500+ in little parts you'll need to get so you dont have any problems(just FYI). Now, yes, im sure i spent somewhat more on my engine than i would have a swap, but i dont do only some of whats needed, i do all and more. Is it worth it, maybe. AM i saying "swaps suck"? Hell no! I'd still like to have a C5 engine eventually...run all motor, hehe.
Rob