the spec you listed sounds quite similar to mine about 12 years ago when it was rolling roaded at 141bhp except mine had the standard exhaust manifold and standard throttle body, so you might get a bit more. You've not said what size pulley you're going to use, I assume 65mm (which is what mine had, was the standard size with PSD toothed belt kits).
You might see 150 with a custom-remap, using an off the shelf chip will always be a compromise.