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First figure out what you want to do with the car. Determine its purpose and then people can better help you.
Regardless, I would build the suspension first. Build a car with suspension and a motor you can "outdrive" instead of a car with a crapload of power you don't even know what to do with.
You leave yourself the possibility to improve your driving with your suspension fully addressed. Here's how it could go:
1. You build the motor all out with like 400hp and don't really touch the suspension besides coilovers. Let's say you go to the track (does'nt matter how you race) but you might lose control because you never adjusted your suspension to how you will drive. You might crash and say goodbye to your 240 minus the motor if you can salvage it and the 3 wheels that didnt get destroyed.
2. Start from the ground up like how everyone says. I thought I could build a motor and worry about suspension later. I was wrong. There is a lot down there that you can make better. Believe me, you can go apeshit with spending money on stuff down there.
I'm getting close to finishing up only my Rear suspension and I already have over 2 grand out back with a stock differential not counting coilovers. I still have the front to do.
I know there are plenty of people who can swap in a junkyard v8 for under 2 grand.
You can always find a motor. Do the motor last if you already have your ka or sr running properly.
I would recommend you
-google some suspension basics threads, roll center thread here is very informative
-I see that your sig says your car is low, search for the SPL parts geometry correction pdf on their site, splparts.com
-Look into getting an aluminum steering bushing
-isis rear arm package is like $400, it's a good start to learning how to adjust all the settings to where you want it. If you crash, you won't feel too bad about it versus crashing with $1200+ arms.
-traction arms you don't need yet
-buy good tires
- I hope you have a good BMC to go with the wilwoods
I was also broke early last year and now I'm going full on racecar with my 240. Be patient, spend money where you need to once you finally understand that you need to spend it on the suspension and not a 600hp ls1.
Simply put, the difference between 500hp 240's and 500hp corvettes is that from the factory, the corvette was built to handle the power and keep you going in the right direction. The 240sx was built for the middle aged woman back in the day.
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