There is quite a bit we can do to get you more power from your Stag engine but bear in mind that there is a reliability trade-off as the Stag engine is not that robust. If you want better reliability a Rover engine conversion with a Rover 5-speed gearbox and a Holley carb on an Offenhauser manifold will give you 155 bhp. Or if you want even more power you can go the whole hog (and why not?) and fit a Rover 3.9, 4.2 or 4.6 fuel injected engine producing over 300 bhp. I can help you with everything you need and shedfulls of advice.