I would be careful with turbos off ebay. If they are used have them disaasembled and inspected, not bad on price. I would consider even using a pair of T04s since everyone seems to throw them away these days. I built a car years ago with 2 T04s on it with a water to air intercooler and 377 inches of small block chevy. Its gone high 8s at over 160 at 16 pounds of boost and an 8 inch tire. You will be surprised at how fast you can go with a small turbo. Your combo looks good, I would use a bigger exhaust housing like the one your talking about .96 A/R.