Mexican Mopar 360: i need to know how to have more horsepowers

I'm curious why the intent on higher KMH? With your setup you'll never get that in the 1/4 anyways. A car like that would need in the area of 700 horse to hit 200 KMH in a 1/4 mile, as a guess. How soon/short do you wanna hit 200 KMH? What kind of budget do you have? How much of the car are you willing to change? I mean you could put in a higher rear gear and probably go over 200 KMH, but it would take you forever to get there.

Just as a guess, I'm assuming 26/27 inch tires. With that 3.54, and 5000 RPM, you'd top out at around 180 KMH. Swap the gears out to 3.07s and you'll hit barely 200 KMH. It'll take a while to get there. It won't go as quick off the line. But you'll hit your goal of over 200 KMH, that's the cheapest way of doing it. Or swap the rear end out for a 8-1/4 and then you can put gears in the 2.71 or 2.94 range. Both of which you'll hit over 200 KMH. But then you'll have a weaker rear end unless you spend the money building it.

In the end, the power of the engine has a limited effect on high speed in your case. The altitude isn't affecting your top speed. Just how soon you hit it. It really doesn't take much power to move a vehicle at high speed. Which is why a VW bug can cruise down the highway with a whopping 50 HP. The power determines how quickly you get there. If your goal is top speed. Forget about power. Gear it for top speed. If your goal is how quick you can get to 200 KMH, well then you need to worry about power. And budget.